By saying "references are hardly worth the paper they are written on." (Line 6, Para.1), the author suggests that references only include ______.

A．Bemuse nine is an odd number.
B．Because the elevator got stuck.
C．Bemuse there are too many people in the elevator.
D．Because the elevator couldn’t go to the floors above eight floor.

A．People in the United States.
B．The characteristics of American English.
C．Foreigners in the United States.
D．The teaching of ESL in America.