Mark owns a cattle ranch near Hugo, Oklahoma. Mark is currently producing beef at an output level where marginal revenue exceeds marginal cost. In order to

maximize his profit, Mark should

O A. decrease his output.

OB. shut down his ranch.

O c. not change his output.

OD. increase his output.

O E. probably change his output, but more information is needed to determine if he should increase, decrease, or not change it.