Which of the Following Statement About Time Effects Is False

Which of the following statement about time effects is false?

A) In the United States, about 80 per cent of work time is spent on the task and perhaps 20 per cent is used for social activities.
B) In Japan social time (such as having tea with peers in the middle of the day) is considered to be a part of work.
C) In the United States it is completely acceptable to show up two hours late to a children's birthday party.
D) All of the above statements are true.