Disadvantages of a Within-Subjects Design the Hypothetical Study of Car-Buying

Disadvantages of a Within-Subjects Design The hypothetical study of car-buying preferences was based on the premise that the type of car people first learn to drive influences later purchasing decisions.This study could not use a within-subjects design because

A) it would be hopelessly confounded by order effects.
B) researchers cannot manipulate the first car subjects learn to drive.
C) subjects can only participate in one condition (compact or smaller car) .
D) there are large individual differences in car-buying preferences.