Figure 2-8 Figure 2-8 Above Shows the Production Possibilities

Figure 2-8 Figure 2-8 above shows the production possibilities frontier for Vidalia, a nation that produces two goods, roses and orchids.
-Refer to Figure 2-8. If Vidalia chooses to produce 40 dozen orchids, how many roses can it produce to maximize production?

A) 30 dozen roses
B) 50 dozen roses
C) 100 dozen roses
D) 150 dozen roses