In politics, astronauts are generally().

单项选择题When was the American Football Association founded()

A．In 1913.
B．In 1930.
C．In 1914.
D．In 1917.

单项选择题When a consumer finds that his purchase has a fault in it, what is the first thing he should do()

A．complain personally to the manager.
B．threaten to take the matter to court.
C．write a firm letter of complaint to the store of purchase.
D．show some written proof of the purchase to the store.