Elliot Liebow's Work on Homeless Women's Shelters Is an Example

Elliot Liebow's work on homeless women's shelters is an example of a research "bargain" because ________.

A) he gave food to the gatekeeper in exchange for access to her friends in the shelter
B) he shared his work with participants and included their responses in his book, but he did not change his analysis
C) he gained access to the homeless shelter after signing a strict confidentiality agreement for the manager of the shelter
D) he agreed to report any "illegal" conduct that he saw during the course of his observation right to shelter staff