According to the First Law of Thermodynamics, Applied to a Gas

According to the first law of thermodynamics, applied to a gas, the increase in the internal energy during any process:

A) equals the heat input minus the work done on the gas
B) equals the heat input plus the work done on the gas
C) equals the work done on the gas minus the heat input
D) is independent of the heat input
E) is independent of the work done on the gas