![](https://lstatic.shangxueba.com/jiandati/h5/images/m_q_title.png)
For a profit-maximizing firm, the price level equals its marginal revenue (MR) when ______
For a profit-maximizing firm, the price level equals its marginal revenue (MR) when ______.
A.in an oligopolistic market.
B.in a monopolistic situation.
C.in a perfectly competitive market.
D.sales rise with the increase in price level.