Refer to the Following Figure

Multiple Choice

Refer to the following figure:

The graph shows the demands and marginal revenue in two markets, 1 and 2, for a price discriminating firm along with total marginal revenue, MR_T, and marginal cost.
-What total output should the firm produce?

A) 275 units
B) 225 units
C) 175 units
D) 350 units
E) 100 units