Answer:
functionalist; conflict theorist
Explanation:
Structural Functionalists' view society being made of parts which are dependent on each other in order to foster solidarity and stability. This means that no part of society is isolated and part of society will influence the other.
Conflict theorists' view society as made up of classes which have a disparity in terms of the power they have. According to conflict theory there is bound to be a revolution because of this disparity.
Both of these theories analyze society at a macro-level. Hence, Mark is functionalist theorist and John is a conflict theorist.