Which statements about the vagina and cervix are true? Check all that apply.

The cervix produces cervical mucus, which can help sperm survive and pass through the cervix, so statement A is true. The vagina is involved in sexual intercourse and serves as the birth canal, and it can stretch while the cervix opens (dilates) during childbirth. The cervix is the lower part of the uterus, not a part of the vagina, so statement D is false.

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