If Gerry saves $500 per month, then Gerry's ________ will increase by ________.

Refer to the diagram. Assume that G and T 1 are the relevant curves, the economy is currently at A, and the full-employment GDP is B. This economy has a(n):

A.  cyclically adjusted budget deficit.
B.  actual budget deficit.
C.  actual budget surplus.
D.  neither a surplus nor deficit in the actual budget.

Refer to the figure below, which shows marginal benefits (MB) and marginal cost (MC) of activity A:If the decision maker is choosing 400 units of activity A,

A. the activity could be increased by one unit and net benefits will increase by $15. B. this level maximizes net benefits. C. the activity could be reduced by one unit and net benefits will rise by $25. D. the activity could be reduced by one unit and net benefits will increase by $10. E. the activity could be reduced by one unit and net benefits would decrease by $10.