When total cost or total variable cost is increasing, there are increasing marginal returns to the variable input.
(a) true
(b) false

The correct answer is (B) False.

Explanation:

Variable costs, as the name implies, differ with the level of production and are associated with the use of variable factors, such as labor and raw materials. Since the amounts of factors increase as production increases, variable costs increase when it does.

answer; ///i believe that the correct answer is (d) ///all of the

answer; (c) canada,mexico and the united states. i do believe this is the correct answer; /// good luck