According to economists, human activity is unresponsive to changes in costs

Given a constant demand, a rise in prices ______.

a. decreases consumer surplus b. increases consumer surplus c. locks consumer surplus into place d. has little effect on consumer surplus

If economists say that a 7 percent growth in the money supply will increase aggregate demand by 7 percent, they are assuming that velocity

A. will decrease. B. is constant. C. will increase. D. is unpredictable.