Use the Following to Answer Question(s): Marginal Benefits and Marginal

Multiple Choice

Use the following to answer question(s) : Marginal Benefits and Marginal Costs

-(Exhibit: Marginal Benefits and Marginal Costs) In the exhibit, more time spent studying economics adds points to economics scores but subtracts points from accounting scores.At 4 hours of study the student will "maximize" because:

A) MB = MC.
B) MB = 20 and MC = 20.
C) the difference between total benefits and total costs is maximized.
D) of all of the above.