Answer:
D) supervised by a manager who encourages him and trains him to perform better
Explanation:
By the theories of functionalism, the core of society is a stable mechanism that helps to keep social stability. All socialization are processes that help us accept and value these norms, keeping the system and the order in balance.
In the case presented in the question, we can see that Bobby is the new employee who needs to be introduced to the system of the workplace. He is already accepting the system and managing to keep its stability. That is why the positive endorsement and the good socialization can keep his performance even better, which helps the mechanism of the society he is working in.