after ten hours they didn't find it any easier to get up in the morning上面那句话就是found it was not ___for people to get up in the morning after ten hours' sleep.A:easier B:happier C:more important D:more difficult

after ten hours they didn't find it any easier to get up in the morning
上面那句话就是found it was not ___for people to get up in the morning after ten hours' sleep.A:easier B:happier C:more important D:more difficult