An Example(s)of the Complete Participant Role Is(are)

An example(s) of the complete participant role is(are) :

A) joining a sorority or fraternity to study initiation rituals without revealing your identity as a researcher.
B) standing at a street corner and watching whether males or females are more likely to jay-walk.
C) telling a motorcycle gang that you are a researcher and would like to ride with them for a year to understand their interaction patterns.
D) being a newspaper reporter who interviews union workers to learn about recent strike efforts.
E) all of these choices are examples of the complete participant role.