The Figure Given Below Shows the Revenue and Cost Curves

The figure given below shows the revenue and cost curves of a perfectly competitive firm.Figure 10.5
MC: Marginal cost curve
MR: Marginal revenue curve.ATC: Average-total-cost curve
AVC: Average-variable-cost curve
-A perfectly competitive firm's supply curve is the portion of the:

A) TC curve that lies above the TR curve.
B) MR curve that lies above the MC curve.
C) AFC curve that lies above the AR curve.
D) AVC curve that lies above the ATC curve.
E) MC curve that lies above the AVC curve.