When a firm’s total revenue is at the maximum, marginal revenue is? By: Sunday|Published on: Aug 5|Categories: 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:The marginal revenue curve of a monopolist is?The elasticity of demand for a firm's product is 2.…In the long run, a firm must shut down if its…A firm with marginal cost equals to its marginal…The total revenue of the firm is represented by?SEE ALSO If wage rate is less than the average revenue product, the firms would be earning?