Correct Answer: D

Rationale: The correct answer is D. During pregnancy, it is crucial to avoid taking any medication without consulting a healthcare provider to prevent harm to the developing fetus. Choices A, B, and C are important aspects of prenatal care but do not specifically address the potential risks associated with taking medications during pregnancy.

Correct Answer: B

Rationale: Notifying sexual partners is crucial to prevent the spread of the infection.

Correct Answer: B

Rationale: Maintaining a healthy weight and exercising regularly are key factors in cancer prevention.

Correct Answer: C

Rationale: A heart rate of 90 beats per minute requires immediate intervention when assessing a client receiving a blood transfusion. This finding can indicate a potential transfusion reaction, such as a hemolytic reaction or fluid overload, which requires prompt evaluation and management to prevent serious complications. While a temperature of 100.4°F (38°C) may indicate a mild fever, it is not typically an immediate concern during a blood transfusion. A blood pressure of 110/70 mm Hg is within the normal range, and complaints of feeling cold can be addressed but do not indicate an urgent need for intervention compared to the critical nature of a potential transfusion reaction indicated by an elevated heart rate.

Correct Answer: D

Rationale: Measuring the prevalence after four months provides data on the program's long-term effectiveness.