true and false with explanation

For the following, please answer "True" or "False" and explain why. (A) The "Law of Diminishing Marginal Returns" could also be termed the "Law of Increasing Marginal Costs." [4 points] (B) Unlike indifference curves, isoquants can intersect. [3 points] (C) If a firm doesn't make an economic profit, it will shut down. [3 points] (D). If a firm sets marginal revenue equal to marginal cost, it will make an economic profit. [3 points]