Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
Figure: Marginal Benefits and Marginal Costs
-(Figure: Marginal Benefits and Marginal Costs) Look at the figure Marginal Benefits and Marginal Costs. More time spent studying economics adds points to economics scores but (MB) subtracts points from accounting scores (MC) . When Claudia studies economics for four hours, the marginal benefit is _____ points; when she studies for six hours, the marginal benefit is _____ points.

A) 20; 10
B) 30; 10
C) 20; 0
D) 20; 30