What is one of the major sources of confusion， misunderstanding and frustration in cross-cultural communication？

What is one of the major sources of confusion， misunderstanding and frustration in cross-cultural communication？
A.The difference between high and low-context communication.
B.The difference in languages spoken by people from difference countries.
C.The difference in jobs between the people communicating.
D.The difference in age between the people communicating.
正确答案：The difference between high and low-context communication.