Which is the first stage of Maslow's Hierarchy of Needs?

Marginal cost is the

A) cost of an increase in an activity. B) total cost of an activity. C) cost of an activity minus the benefits of the activity. D) cost of all forgone alternatives.

When the required reserve ratio is 20 percent, the money multiplier is:

a. 0.2. b. 1.2. c. 2. d. 2.5. e. 5.