问题详情

The moves by Toyota to buy local components are part of a broader trend by many manufacturers to dump longtime Keiretsu suppliers in favor of the cheapest vendors around. Bridgestone Corp., for one, has ______ in the U.S. and Canada since buying Firestone Tire & Rubber Co. in 1989, doubling its production to 23 million tires a year.
A、broomed
B、mushroomed
C、boomed
D、classroomed