Beth, an American citizen, travels to Italy on vacation and buys an espresso machine to bring home. Her purchase increases:_____

a. Italy's GDP
b. Italy's GDP and U.S. GDP, since Beth spent dollars buying the machine.
c. U.S. GDP since she will have the machine with her at home in the U.S.
d. Neither U.S. nor Italy's GDP, since the product was bought in one country and used in another.