Talcott parsons researched from a structural functionalist perspective.

a. the sick role
b. doctors’ power and status
c. the medical establishment
d. doctor-patient confidentiality

Talcott Parsons researched A. the sick role.

Explanation:

The sick role is a term in Sociology, refering to sickness and the rights and obligations a sick individual has.

Parsons was a functionalist sociologist, meaning that all parts of society are important for its long-term development. When someone is sick, he/she is no longer functional within the society and thus has to be taken care of since it comes with a "sanctioned deviance" role.

aren't cheetos good enough to be president?

i am pretty sure it is d.