A proverb is a short saying that states a general truth or advice.
They're popular as they are told and retold through generations,
incorporated in books and stories that grandparents narrate to children.
Proverbs have a deeper meaning than the one you perceive at first. The
given proverb is an advice that means that one should not betray (bite) the person who helps one (feeds you). This is given in option A, hence it's correct. Options B, C and D are general statements and are not related to the proverb, hence B, C and D are incorrect.