Suppose Congress and the President Are Negotiating Over Whether to Increase

Suppose Congress and the President are negotiating over whether to increase spending on defense or higher education, economists would suggest that they set the amount of spending

A) must be held constant.
B) where the total benefit to each is equal.
C) where the average amount spent per student equals the average amount spent per soldier.
D) on each program so that the marginal benefit of the last dollar spent on each area is equal.