Under What Circumstances Would Something Have a ÒProtective EffectÓ

Under what circumstances would something have a Òprotective effectÓ?

A) Something about a specific experience (e.g., being married) confers advantages or benefits.
B) Random changes in genes from one generation to the next result in increased fitness.
C) Love leads to a strong desire to protect the object of affection.
D) The family circumstances of children influence the way children will manage their own intimate relationships as adults.