Even Though the American Telecommunications Company MCI Had More Cell

Multiple Choice

Even though the American telecommunications company MCI had more cell phone subscribers at the time when AT&T decided to enter the cell phone market,customers were willing to sign up for AT&T's service.This is most likely due to

A) the lack of complementary goods for MCI.
B) MCI's insufficient network externalities.
C) the lack of sophistication of consumers.
D) the expectation of consumers that the installed base of AT&T will eventually increase.