The energy equation for a CV is given as:
$$\frac{\partial}{\partial t}\int_{CV}\rho edV + \int_{CS}\left(\tilde{u} + \frac{p}{\rho} + \frac{V^2}{2} + gz\right)\rho V \cdot \hat{n}dA = \dot{Q}_{net,in} + \dot{W}_{Shaft,net in}$$
The 4th term represents:
The net rate of heat transfer into the CV
None of these are correct
The net rate of work being done on the CV
The net rate of energy flow across the control surface
Time rate of change of the total stored energy of the contents of the CV