When the Gas Enclosed Beneath the Piston Shown in the Figure

Multiple Choice

When the gas enclosed beneath the piston shown in the figure receives 2170 J of heat,,from its surroundings,it performs 2840 J of work in raising the piston.What is the change in the internal energy of the gas?

A) +670 J
B) -670 J
C) -5010 J
D) +5010 J
E) zero joules