If we want to get some information about a new country, we could ______.

A．She is afraid he may discover her ignorance.
B．She is afraid it may affect her grade.
C．She is not completely sure of her own opinion.
D．She is too busy and has no time to waste.

A．Its obscure definition.
B．Its unknown causes.
C．Its controversial treatment.
D．Its unnoticed symptoms.