When a person is off work and hanging out at home, he doesn't like it, why

A．He has nothing to do during the holidays and so he feels useless.
B．His routine timetable is changed so he doesn't feel comfortable.
C．He doesn't have any responsibilities and pressures, so he feels uneasy.
D．If he feels happy during the holidays, work will be more unbearable when the holi- days are over.