单项选择题

The writer states that, until recently, Americans thought of their country as a ______.
A) source of enlightenment C) recipient of a European heritage
B) leader in technological progress D) peacemaker

A.The writer states that, until recently, Americans thought of their country as a ______.
B.source of enlightenment
C.leader in technological progress
D.recipient of a European heritage
E.peacemaker