How should a Consultant configure this expertise for Contractor 1 versus Contractor 2?

Universal Containers utilizes two contractors, Contractor 1 and Contractor 2, to perform repair work, Contractor 1 has provided service longer for Universal Containers and is considered to have more repair work expertise than Contractor 2.

How should a Consultant configure this expertise for Contractor 1 versus Contractor 2?
A . Assign Contractor 2 as an excluded Resource.
B. Assign Contractor 1 and 2 different capacities for repair work.
C. Assign Contractor 1 as a Preferred Resource.
D. Assign Contractor 1 and 2 different Skill Levels for repair Work Type.

Answer: D