Which of the following scenarios are either not accounted for or measured inaccurately by either the income or the expenditure methods of calculating gdp for the united states?
a. the loss of enjoyment people incur when scenic land is converted to commercial use.
b. the value of babysitting services, when the babysitter is paid in cash and the transaction isn't reported to the government.
c. federal government paychecks to soldiers.
d. the quality of goods available to consumers.