An Ideal Gas Has Molar Specific Heat C_p at Constant $\Delta$

Multiple Choice

An ideal gas has molar specific heat C_p at constant pressure.When the temperature of n moles is increased by $\Delta$ T the increase in the internal energy is:

A) nC_p $\Delta$ T
B) n(C_p + R) $\Delta$ T
C) n(C_p - R) $\Delta$ T
D) n(2C_p + R) $\Delta$ T
E) n(2C_p - R) $\Delta$ T