After 18 Months as Office Manager in Taiwan, Dennis Cooper

After 18 months as office manager in Taiwan, Dennis Cooper, called his boss, Jack Swanson, headquartered in Chicago. Dennis said, "Jack, I hate to tell you this, but things aren't well on the home front. We just haven't been able to make the adjustment to living in a foreign country. I'd like to request a transfer back to the States." Jack replied, "Let me see what I can do." After the phone conversation was concluded, Jack soberly reflected that, as is often the case, an expatriate, in this case Dennis, had failed in a foreign assignment due to

A) extensive travel.
B) cultural differences.
C) family issues.
D) language barriers.
E) religious beliefs.