Final answer:
The nurse should suggest applying cold compresses and wearing a well-fitting, supportive bra to aid in relieving the breast sensitivity and soreness during pregnancy.
Step-by-step explanation:
Breast sensitivity and soreness during pregnancy are common issues caused by hormonal changes, particularly due to increased levels of estrogen and progesterone. These hormones contribute to the development of mammary tissue and enlargement of the breasts, preparing for lactation and breastfeeding after childbirth. Therefore, the nurse should suggest to the multipara woman experiencing soreness in her fifth month of pregnancy to apply cold compresses and wear a well-fitting, supportive bra (C), as this can help alleviate discomfort. A well-fitting bra provides support and helps distribute the breast weight, reducing strain on the chest, shoulders, and back, while cold compresses can alleviate swelling and soreness. Diuretics are not recommended without medical consultation, and aspirin might not be safe during pregnancy. Massages with lotion and wearing loose clothing could help but may not provide the structural support needed in this case.