Which of the Following Does NOT Apply to Spermicides and Barrier

Which of the following does NOT apply to spermicides and barrier devices as means of contraception?

A) They may be used together for contraception.
B) Spermicides come in gels, foams, creams, and ointments and may be bought OTC.
C) Barrier devices include condoms, diaphragms, and cervical caps, which have certain times and methods for application and removal for effectiveness.
D) Barrier devices are moderately effective and protect against sexually transmitted diseases.
E) They both may cause allergic reactions in some people.