Why do small engine cars consume less fuel?

Answer 1

A. Because small engine cars weigh less overall than larger cars.

B. Because small engine cars have small wheels which equals less rolling resistance.

C. Because small engine cars are smaller in dimension, allowing them to squeeze into small spaces not accessible by larger cars, resulting in less time spent in traffic, idling and increasing average fuel consumption.

D. Because statistically small engine car owners are shorter and weigh less, and have smaller families (or large families and many smaller cars).