Correct Answer: C

Rationale: The correct answer is C because it accurately explains the physiological change in the eye that leads to the need for bifocals. As individuals age, there is a gradual thickening of the lens of the eye, which affects the eye's ability to accommodate for near vision. This thickening makes it harder for the eye to focus on close objects, necessitating the use of bifocals to correct this near vision issue. Choices A, B, and D are incorrect because they do not provide a scientifically accurate explanation for the need for bifocals in older individuals. Option A is dismissive and does not address the specific change in the eye that leads to the need for bifocals. Option B implies aging as a general concept without specifying the relevant change in the eye. Option D incorrectly states that the eye gets shorter as we age, which is not the reason for needing bifocals.

Correct Answer: C

Rationale: The correct answer is C: Viral set point. The viral set point refers to the stable level of HIV in the body after the initial infection. This state indicates a balance between viral replication and the immune response. The other choices are incorrect because: A) Static stage implies no change, which is not the case with HIV levels fluctuating; B) Latent stage refers to a period of inactivity, not the stable state described; D) Window period is the time between infection and detectable antibodies, not the equilibrium state described.

Correct Answer: B

Rationale: The correct answer is B: Ensuring that the patient receives adequate palliative care. Palliative care focuses on improving the quality of life for patients with serious illnesses, including managing symptoms and providing emotional support. In this case, since the patient is not receiving treatment for her brain metastases, palliative care would be most appropriate to help alleviate any pain or discomfort she may be experiencing and provide holistic support for her and her family. A: Promoting the patient's functional status and ADLs may not be the priority if the patient's prognosis is terminal and she is not receiving treatment for her brain metastases. C: Ensuring that the family does not tell the patient her condition is terminal goes against ethical principles of honesty and transparency in healthcare. D: Promoting adherence to the prescribed medication regimen may not be relevant if the patient is not receiving active treatment for her brain metastases.

Correct Answer: C

Rationale: The correct answer is C: Identifying the offending agent, if possible. This is prioritized in contact dermatitis to prevent further exposure and recurrence. By identifying the specific irritant or allergen, the nurse can guide the patient in avoiding it, leading to effective management. Choices A, B, and D are incorrect because while promoting adequate perfusion, safe use of topical antihistamines, and teaching the use of an EpiPen may be relevant in certain situations, they do not directly address the root cause of contact dermatitis, which is exposure to the offending agent.

Correct Answer: B

Rationale: The correct answer is B: Retinopathy. Tadalafil (Cialis) is contraindicated in patients with retinopathy due to the potential risk of worsening vision problems. Retinopathy is a serious eye condition commonly associated with diabetes, and using tadalafil can lead to further complications in the eyes. It is crucial for patients with retinopathy to avoid medications that can exacerbate their eye condition. Incorrect choices: A: Cataracts - Cataracts do not contraindicate the use of tadalafil. Tadalafil does not have a direct negative impact on cataracts. C: Hypotension - Hypotension is not a contraindication for tadalafil use. In fact, tadalafil can cause a drop in blood pressure, so it should be used with caution in patients with hypotension. D: Diabetic nephropathy - Diabetic nephropathy is not a direct contraindication for tadalafil use. Tadalafil is generally