Devon Is a Graduate Student Beginning an Ethnography of a Preschool

Devon is a graduate student beginning an ethnography of a preschool soccer team.He seeks site entry by contacting the gatekeeper(s) :

A) the parents,because the children are under age 18 and cannot give informed consent.
B) the coach,because she has the authority to allow an outsider into the team.
C) his academic adviser,because he determines whether the study can proceed.
D) the children themselves,because establishing rapport with subjects is essential.