What does a production possibilities curve represent?
a a combination of price and demand of goods and services
b.
a combination of the goods produced before and after a change in a factor of production
c. a combination of two factors of production used to produce a single good or service
d. a combination of two goods that can be produced using limited resources

D. a combination of two goods that can be produced using limited resources

Explanation:

A graph is shown below to make you understand the production possibility curve.

In B and A, the production is possible with the help of limited resources. In C and D, it is inefficient and impossible respectively.

Production possibilities curve also represents if one unit of consumption increases, other unit will automatically fall.

i think the answer to your question is b. directive