Market Company and Nick Enter into a Contract for Nick

Multiple Choice

Market Company and Nick enter into a contract for Nick to cut and trim the landscaping around Market's building before a meeting of the company's sales staff. When Nick's schedule conflicts, he asks Otis to do the cutting and trimming. This transfer of duties is

A) ​a delegation.
B) ​an assignment.
C) ​a third party beneficiary contract.
D) ​alienation.