Sue, Barb, and Carlotta agree to put in $1,000 each to set up a shelter for lost animals. They each work two days a week. Donations fund the day-to-day operations. Do they have a partnership?
选项：

A: Yes, since each has control of the operation
B: Yes, because they are all co-equals in ownership of the shelter
C: No, because they have made no formal agreement
D: No, because there is no business for profit