Employee

that is employer employee relationship,he is simply a manager

This is your third time repeated query on the same subject. confine to only one query and let the experts express their views on the same thread. I have already attended your previous posts on the same subject.

It completely depends on the Agreement if they have entered into one. B can be hired as an employee or as a retainer but both of these are kinds of employment. 

In any case, they are not independent contractors so overall the relationship would be of Employer and Employee.