The Effectiveness of the Contraceptive Sponge Is Based on Which

Multiple Choice

The effectiveness of the contraceptive sponge is based on which of the following:

A) It acts like a barrier to prevent sperm from entering the cervix
B) It can be left in the vagina for 4 days
C) It is significantly more effective for women who have had children than for women who have never had children
D) Its potential for absorbing sperm is thought to be ineffective