Correct Answer: C

Rationale: Assessing the client's risk for falls is crucial as a cluttered environment and poor lighting increase the likelihood of falls.

Correct Answer: B

Rationale: A serum glucose level of 600 mg/dL is extremely high in a client with hyperosmolar hyperglycemic state (HHS) and poses a significant risk of serious complications such as dehydration, coma, and electrolyte imbalances. Rapid intervention is crucial to normalize the glucose level and prevent further deterioration. Serum osmolality of 320 mOsm/kg, serum potassium of 4.5 mEq/L, and serum sodium of 140 mEq/L, while important to monitor in HHS, do not represent an immediate life-threatening condition that requires urgent intervention compared to the critically high glucose level.

Correct Answer: B

Rationale: Hepatitis A is often spread through close personal contact and poor sanitary conditions, which are more common in low-income, cramped living situations.

Correct Answer: B

Rationale: The correct answer is 'B: influenza.' Influenza vaccination is crucial for adults, particularly in rural areas where access to healthcare may be limited. Influenza can cause serious illness and complications, and vaccination helps protect individuals and prevent the spread of the virus. While vaccines for hepatitis A, varicella, and measles, mumps, rubella (MMR) are important, prioritizing influenza vaccination in this scenario is essential due to its seasonal prevalence and potential impact on public health.

Correct Answer: C

Rationale: Middle-aged adults are at a higher risk for developing hypertension and can benefit most from preventive measures.