Bob runs an auto shop. State and federal law require him to dispose of used motor oil properly, which in Bob's case meant that he had to haul it himself to the dump and pay to have it recycled. Recently Bob was contacted by Phillip, who has begun a new business serving local auto shops by collecting and recycling used oil. Phillip convinces Bob that he can dispose of Bob's used oil more cheaply than he can do it himself, because Phillip can take advantage of volume discounts w/ recycling companies. Bob agrees to the service and agrees to pay Phillip on a monthly basis to pick up all the used oil he collects.

The relationship between Bob and Phillip is most likely:

(A) Principal and agent in which Bob is principal.
(B) Contract in which fiduciary duties apply.
(C) Principal and agent in which Phillip is employee.
(D) None of the above.