Correct Answer: D

Rationale: Childhood vaccinations are not a common safety concern for adult patients.

Correct Answer: C

Rationale: Comprehensive diagnostic steps involving psychiatry, neurology, and neuroimaging are necessary to assess underlying conditions and ensure proper management.

Correct Answer: B

Rationale: Noncontrast CT is essential for evaluating potential stroke.

Correct Answer: B

Rationale: Testosterone therapy should be considered first if a deficiency is identified, as low testosterone can contribute to erectile dysfunction.

Correct Answer: A

Rationale: Epinephrine is the first-line treatment for anaphylaxis, as it rapidly reverses the effects of severe allergic reactions.