A nurse is caring for a client who is postpartum and requests information about contraception. Which of the following instructions should the nurse include?

Rationale: A. "You can continue to use the diaphragm you used before your pregnancy.": The diaphragm must be refitted after childbirth due to changes in vaginal and cervical anatomy, so continued use without refitting is not recommended. B. "Place the transdermal birth control patch on your upper outer arm.": The patch should be applied to areas such as the abdomen, buttock, upper torso, or upper outer arm—but not if breastfeeding, as it contains estrogen, which can reduce milk production. C. "The lactation amenorrhea method is effective for your first year postpartum.": This method is only effective for the first 6 months postpartum, provided the mother is exclusively breastfeeding and has not resumed menses. D. "You should avoid vaginal spermicides while breastfeeding.": Vaginal spermicides can be used while breastfeeding. They do not affect milk production or the baby. However, they are not as effective as other methods of contraception and are often used in combination with other methods, such as condoms or diaphragms