A Texas household receives a Social Security check for $1500, which it uses to purchase a $40 pairof shoes made in Thailand by a Thai firm, a $1240 television made by a Korean firm in Korea, and$220 on groceries from a local store. As a result, U.S. GDPa. increases by $40.b. increases by $220.c. increases by $280.d. increases by $1500.