An Ideal Monatomic Gas Undergoes a Reversible Expansion to 1

Multiple Choice

An ideal monatomic gas undergoes a reversible expansion to 1.5 times its original volume. In which of these processes does the gas perform the least amount of work?

A) at constant pressure
B) if the pressure increases in proportion to the volume
C) if the pressure decreases in proportion to the volume
D) at constant temperature
E) adiabatically