It can be inferred from the passage that culture shock may be overcome by ______.

A．when one is back home, he comes back to reality
B．when one is back home, he lives in reality
C．when one is back home, he enjoys all good things in his real life
D．when one is back home, he realizes there are also frustrations in his life home

A．Lacking social interaction
B．not being able to adjust oneself to daily situations in a foreign country
C．lacking consciousness of learning a foreign culture
D．being unable to speak the language of a foreign culture