What have you leaned about the time for telephone calls in many countries?
A.
People are not accustomed to making calls early in the morning.
B.
Peole would think something unpleasant must have happened if they receive a call early in the moring.
C.
People tend to think the call must be of vital importance if the telephone rings early in the day.
D.
People would fell annoyed if they receive a call while they're shaving or having breakfast.