Explain the concept of marginal cost. How does it relate to cost? How is it found? How does the marginal cost relate to cost? O A. Cost refers to the rate of change of marginal cost. O B. Marginal cost refers to the rate of change of cost. O C. Marginal cost is the same as cost. How is the marginal cost found? O A. Marginal cost is found by taking the antiderivative of cost. O B. Marginal cost is found by taking the derivative of cost. O C. Marginal cost is the same as cost. O D. Marginal cost is found by taking the total cost and dividing by the number of items