a) is increasing when the total product of labor is increasin

b) is at maximum where it intersects the Marginal product of labor

c) is upward-sloping if the firm is eperiencing diminishing marginal returns to labor

So the answer is B. However, the issue i have with this question is that it could also be A, because the Average Product of labor is also 1st increasing and then decreasing as diminishing marginal returns take effect.

I dont understand why they threw 2 legit answers in there. Anyone got some clarification on this?

Diminishing returns to labor. AP increases for the first few laborers but decreases over time. Yes AP increases between 1 and 2 but from 2 to 10 it decreases. I see your logic but B is the best answer as it happens 100% of the time.