Mother and Son go bicycle shopping. Son agrees to pay for the bike himself, and the mother agrees to pay if the son does not. The choices below list various uses to which the bicycle might be put, in which case would a writing not be required

A. son will be the only rider and will ride the bike to school

B. Mother will be the only rider and will use the bike for exercise

C. Son will be the primary rider, but the mother may borrow it from time to time

D. No answer is correct every choice requires a writing