You need to set up skills-based assignments according to company policy.
What should you do first?

A.
Create an enterprise custom field for tasks with a lookup table listing skills. Then assign each task a skill.

B.
Create an enterprise custom field for resources with a lookup table listing languages. Then assign each resource a language.

C.
Create a multi-value enterprise custom field for resources with a lookup table listing roles.
Then assign each resource a role.

D.
Create a multi-value enterprise custom field for resources with a lookup table listing skills and proficiencies. Then assign each resource multiple skills and proficiencies.