If the economy is suffering from inflation, the federal reserve should a. sell bonds and raise the reserve requirement. b. sell bonds and lower the reserve requirement. c. sell bonds and lower the discount rate.

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.