Which of the following is a strength of cohort studies?

Correct Answer: B

Rationale: Cohort studies (B) track multiple outcomes (e.g., smoking and various diseases). A, C, and D are false; they’re costly, slow, and bias-prone.

Correct Answer: C

Rationale: Cohort studies (C) compare exposed vs. unexposed outcomes (e.g., smoking and cancer). A is snapshot, B is retrospective, D is experimental.

Correct Answer: C

Rationale: Matching (C) controls confounders (e.g., age) in case-control studies. A, B, and D are incorrect or unrelated.

Correct Answer: B

Rationale: Justice (B) ensures fair burden-benefit distribution (e.g., no group exploited). A is beneficence, C is autonomy, D is non-maleficence.

Correct Answer: B

Rationale: False negative (B) is missing a diseased person (e.g., negative test despite cancer). A is false positive, C and D are correct results.