These flowers are watered（）

A．It is important to be on time for class in the United States.
B．The importance of being on time differs among cultures.
C．People learn’ the importance of time from the culture they are in.
D．Students being late for class should explain the reason to their teacher.

A．it is important to arrive at the appointed time
B．it is rude for professors to be late for class
C．it is normal for students to leave during lectures
D．it is natural to keep the professor staying after class