The company must reduce costs to compete （ ）.

The company must reduce costs to compete （ ）.
A、vigorously
B、effectively
C、efficiently
D、rigorously
【正确答案】：B
【题目解析】：本题考查副词辨析。vigorously”充满活力地”， effectively“有效地”，efficiently“高效率地”， rigorously“严厉地”。句意：公司要有效地参与竞争必须降低成本。故选B。