Select the correct answer. Why is it up to readers to research a story's historical and cultural context themselves?

A.
because there is not time within a short story's limits to provide everything a reader needs to know

B.
because short stories are much more challenging to read than novels or plays

C.
because most short stories tend to be set in places unfamiliar to most readers

D.
because it is only fair that a reader take some responsibility for his/her own learning