Correct Answer: B

Rationale: Erectile function is primarily controlled by the parasympathetic nervous system, which facilitates the dilation of blood vessels in the penis. The parasympathetic nerves are responsible for vasodilation in the penis, allowing blood to enter and creating an erection. Sympathetic nerves, on the other hand, are responsible for ejaculation by causing contraction of the muscles around the vas deferens. Somatic nerves are involved in sensation and movement, not specifically in controlling blood supply to the penis. Spinal reflexes can play a role in the erectile process, but they are not directly responsible for controlling the venous blood supply.

Correct Answer: C

Rationale: Conjugated estrogens are used to prevent osteoporosis in postmenopausal women.

Correct Answer: C

Rationale: Oxygen therapy is prioritized to improve oxygenation in clients with pulmonary edema.

Correct Answer: A

Rationale: The correct answer is A because the main reason HRT is not recommended for all women is due to the increased risks of stroke and breast cancer associated with its use. Choices B, C, and D are incorrect as they do not address the primary concerns regarding HRT use. HRT can indeed cause mood disturbances and may have effects on bone health, but the main concerns regarding its use revolve around the risks of stroke and breast cancer.

Correct Answer: C

Rationale: Immune insufficiency is a possible cause of recurring respiratory infections in a 5-month-old child.