问题详情

According to the passage, ______ .
A．American automobile industry slowed down its employment of staff since 1900
B．five dollars a day for the blue collar worker was quite a decent wage at the beginning of the century
C．every car produced will enable the manufacturers to have a profit of $100,000
D．Ford, GM and Chrysler, the only existing motor manufacturers in U. S. have a business of $ 200 billion annually