Answer:
a. the purchase of fighter jets.
Step-by-step explanation:
A transfer payment is a payment made for which the payer usually the government doesn´t receive any goods, products or services, examples of this are subisidy, social security, umemployment compensation, and funds to build interstate highways, as the highways are not a good or service, is part of what is considered a transfer payment, the difference from the purchas of the fighter jets is not a transfer payment as the government is getting a product in return from that payment.