Business communication has become more challenging than ever before，because of（）

Business communication has become more challenging than ever before，because of（）
A.the pervasiveness of digital technology
B.the globalization of business and the increase in workforce diversity
C.the increasingly flattened management style and emphasis on team work
正确答案：the pervasiveness of digital technology the globalization of business and the increase in workforce diversity the increasingly flattened management style and emphasis on team work