In an adiabatic process, the change in internal energy of a gas is equal to the negative of the work done by the gas.

a) True, and Statement 1 is the correct explanation of Statement 2.
b) True, but Statement 1 is NOT the correct explanation of Statement 2.
c) False, and Statement 1 is the correct explanation of Statement 2.
d) False, and Statement 1 is NOT the correct explanation of Statement 2.