At the Outset, the Goal of Both Interview and Interrogation

At the outset, the goal of both interview and interrogation is ________. However, once someone has been identified as a suspect, the goal of an interrogation becomes:"

A) to obtain useful information; to urge him or her to retain counsel
B) to obtain a confession only; to force him or her to accuse someone else
C) to obtain useful information; to obtain his/her alibi
D) to obtain useful information; to obtain a confession