A System Has a Heat Capacity of 100 J

Multiple Choice

A system has a heat capacity of 100 J.This means

A) it is possible to extract the 100 J of heat and convert it to work.
B) it is possible to transfer the 100 J of heat to the environment.
C) some of the heat capacity can be converted to work.
D) some of the heat capacity can be transferred to another system if there is a temperature difference.
E) (C) and (D)