$(01\mathrm{.}02$ MC$)$

Use the PPC below to answer the following question.

A graph has Wheat on the horizontal axis and Corn on the vertical axis. A curved line connects the values $40$ on the horizontal axis and $50$ on the vertical axis. Point A is inside the curve, between the curve and the axes. Point B is on the curve, corresponding to values $25$ on the horizontal axis and $45$ on the vertical axis. Point C is on the horizontal axis at value $40.$

What is the opportunity cost of producing $25$ units of wheat?

Question $3$Select one:

a$.$

$5$ units of corn

b$.$

$15$ units of corn

c$.$

$25$ units of corn

d$.$

$45$ units of corn

e$.$

Indeterminate