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 9.2
MC: Marginal cost curve
MR: Marginal revenue curve
ATC: Average-total-cost curve
AVC: Average-variable-cost curve
-Refer to Figure 9.2.The firm will suspend production if the price falls below:

A) $30.
B) $50.
C) $10.
D) $20.
E) $35.