In an Adiabatic Process

In an adiabatic process:

A) the energy absorbed as heat equals the work done by the system on its environment
B) the energy absorbed as heat equals the work done by the environment on the system
C) the energy absorbed as heat equals the change in internal energy
D) the work done by the environment on the system equals the change in internal energy
E) the work done by the system on its environment equals the change in internal energy