Woman: Tom, I"m glad I ran into you. I"ve been trying to call you but you"re never at home. Where have you been hiding lately
Man: Actually I"ve been very busy recently. I"m getting ready to go to the United States for Christmas, and I have a million things to do.
Question: Why couldn"t the woman get the man on the phone
A．Because he has been hiding lately B．Because he has been busy preparing his trip C．Because he has been back home D．Because he has to work hard for traveling expense