Calculate $\Delta$ U of a Gas for a Process in Which the Which

Multiple Choice

Calculate $\Delta$ U of a gas for a process in which the gas absorbs 19 J of heat and does 49 J of work by expanding.

A) 30 J
B) 68 J
C) -68 J
D) 0,because $\Delta$ U is a state function
E) -30 J