Sally purchased a log-splitter five years ago. This year, she purchases some new parts, gasoline, oil, and spends 2 hours repairing the log-splitter. Which of the following is included in this year's GDP?

a. the amount she paid to buy the new parts
b. the amount she paid to buy new parts and gasoline
c. the amount she paid to buy new parts, gasoline, and oil.
d. the amount she paid to buy new parts, gasoline, oil, and the market value of the 2 hours spent to repair the log-splitter.

c