Answer:
The correct answer is Greg. He is the agent.
Step-by-step explanation:
First of all, the term agent, in business, is understand as the individual that currently manages another person's business affairs and that commonly spend much of his time negotiating contracts for his clients.
Secondly, according to the definition of agent, it is understandable that in this case the agent is Greg due to the fact that he is the one that has to sell the collection, under Michael's orders.