What does the author think about culture shock

A．Japanese students study much harder than Columbian students.
B．Columbian students score higher than Japanese students in math.
C．Columbian students are more optimistic about their math skills.
D．Japanese students have better conditions for study.

A．The man should start running daily.
B．She also prefers to exercise in the afternoon.
C．It’s important to warm up before exercising.
D．The man should continue his exercise program.