When a firm’s total revenue is at the maximum, marginal revenue is? by Sunday | Aug 5 | Economics WAEC | 0 comments A. at the maximum B. negative C. zero D. positive E. constant Correct Answer: Option C – zero Users Also Read These:A firm with marginal cost equals to its marginal…When the total products are at its maximum marginal…The necessary condition for a firm to be in…When the Total Product (TP) is at maximum point, the…The elasticity of demand for a firm's product is 2.…