Suppose That in Most Car Collisions Between Cars of Unequal

Suppose that in most car collisions between cars of unequal size,the smaller car sustains the most damage and its occupants suffer the most injury.In answering the following question,assume that,on average,smaller cars generate less air pollution and that every person in the economy drives at least one car.
Refer to the information above.Individuals have a private incentive to:

A) buy smaller cars so that all collisions will be between owners of smaller vehicles.
B) buy smaller cars because they pollute less.
C) buy larger cars so that they are safer in the event of a collision.
D) not change the size of their cars because their original choice reflected an optimal choice.