Use the Figure to Answer the Following Question(s)

Use the figure to answer the following question(s) .
Figure 11-7

The demand and cost conditions in an industry are as depicted in Figure 11-7. In the viewpoint of economic efficiency, what would the ideal price and output be?

A) price, $7; quantity produced, 100
B) price, $10; quantity produced, 170
C) price, $14; quantity produced, 100
D) price, $7; quantity produced, 200