Figure 2-3 shows the production possibilities curve of an economy in the production of food and clothing. If the economy operates at Point A on the production possibilities curve shown above, then:
选项：

A:it cannot increase its output of food.
B:it cannot increase its output of clothing.
C:it cannot simultaneously increase its output of both food and clothing.
D:it is not utilizing its resources inefficiently.
E:it cannot decrease its output of food.