When Elijah Anderson Began His Fieldwork with Street Corner Men

When Elijah Anderson began his fieldwork with street corner men on Chicago's South Side,he had no research question.This choice was valid because he was using the grounded theory approach,which involves researchers

A) generating theory based in the data itself.
B) co-constructing theory and focus with research subjects.
C) reading theory and relevant literature after fieldwork,instead of before.
D) doing ethnography from a literary point of view,instead of scientific.