Correct Answer: A

Rationale: When Ms. Barrett's distance vision is measured as 20/30, it means that she can read from 20 feet away what a person with normal vision can read at 30 feet. The numerator (20) represents the distance in feet between the chart and the client, while the denominator (30) indicates the distance at which a normal eye can read the chart. In this case, Ms. Barrett's vision is slightly worse than normal, as she needs to be closer to the chart to read it clearly. Therefore, choice A is correct. Choices B, C, and D are incorrect: Choice B reverses the distances, Choice C assumes the client can read the entire chart from 30 feet, and Choice D introduces information not related to the 20/30 measurement.

Correct Answer: C

Rationale: The correct answer is chocolate. Ingestion of chocolate can reduce lower esophageal sphincter (LES) pressure, leading to reflux and clinical symptoms of GERD. Lettuce, eggs, and butterscotch do not affect LES pressure and are less likely to trigger heartburn in individuals with GERD. Therefore, clients who are prone to developing heartburn due to GERD should avoid consuming chocolate to manage their symptoms effectively.

Correct Answer: B

Rationale: By 12 months of age, children should have received the DTaP (diphtheria, pertussis, and tetanus) vaccine along with the polio vaccine. The MMR (measles, mumps, and rubella) vaccine is not typically given until the child is 12-15 months old. Therefore, option B is correct as it includes vaccines that are usually administered by 12 months of age. Options A, C, and D are incorrect as they include vaccines that are typically given after 12 months of age.

Correct Answer: D

Rationale: All of the choices are methods of preventing cancer. Sleep is important in maintaining homeostasis, which helps the body respond to disease. Monthly breast examination can indicate cancer or fibrocystic disease. Stress can have a physiological response in the body that decreases the immune response and increases the risk of disease. Therefore, all the options provided are important in cancer prevention, making 'All of the above' the correct answer. Option A is crucial for overall health and immune function, option B aids in early detection, and option C is vital as chronic stress can weaken the immune system.

Correct Answer: C

Rationale: The correct answer is 'when needs change.' It is crucial for the nurse to remain adaptable and adjust the plan promptly when the patient's needs or condition change. Choice A, 'halfway through the shift,' may not align with the timing of when needs actually change, making it less optimal for plan modifications. Choice B, 'at the end of the shift before the nurse reports off,' is too late to address evolving needs effectively. Choice D, 'after the top-priority tasks have been completed,' limits the nurse's ability to respond promptly to changing priorities, as needs may shift before all top-priority tasks are finished.