What Feature Distinguishes Bailment from a Contract of Purchase and Sale

Multiple Choice

What feature distinguishes bailment from a contract of purchase and sale?

A) Most commercial contracts are bailments,requiring payment for use of property.
B) Most bailments are gratuitous,requiring no payment for use of property.
C) A bailor retains ownership upon transfer of possession to the bailee.
D) A bailment is typically short term,while contracts cover a longer term.