Early specialization is not wise. Students should have a wide exposure to world culture before they specialize. In this sentence, what does "exposure" mean?
A.
when someone is in a situation where they are not protected from something dangerous or unpleasant
B.
the action of showing the truth about someone or something, especially when it is bad
C.
the attention that someone or something gets from newspapers, television etc.
D.
the chance to experience new ideas, ways of life etc.