The foreign company has been______ running this factory for deca

The foreign company has been______ running this factory for decades.
A、enormously
B、effectively
C、infinitely
D、extremely
【正确答案】：B
【题目解析】：句意：这家外国公司几十年来一直在有效地经营这家工厂。effectively  adv. 有效地，生效地​