If increasing quantities of a variable factor are applied to a given quantity of fixed factors, then the law of diminishing returns tells us that... a. The marginal product and the average product of the variable factor will eventually decrease. O b. Total product will eventually begin to fall. O c. The average product will eventually decrease, but only if total product is held constant. O d. The average product will eventually decrease with constant marginal product. O e. The marginal product will eventually decrease with constant average product