What does the author think about culture shock

A．Because every species becomes extinct.
B．Because humans beings are powerful enough to kill other species.
C．Because of over-population.
D．Because human being is still a young species though it is exploiting the environment.

A．The homeowner is afraid of being accused.
B．The house sitter pleads again and again.
C．Most house sitters are very poor.
D．The homeowner doesn’t want to bother.