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:If the fixed cost of a firm is 800.00 Naira and it's…What is the firm's marginal revenue?The necessary condition for a firm to be in…A market structure where profit is maximized when…A firm with marginal cost equals to its marginal…