Answer:
c. human skills
Explanation:
One is said to have human skills if such a person have the ability to work well in cooperation with other people to get things done.
The proper execution of one's human skills is often called human relations.
Human skill entails that the individual involved must be able to understand, work with, and relate to both individuals and groups to build a teamwork environment.
Ability to explain complicated concepts in simple word, excellent communication skills, and being approachable as exhibited by Derek, means that He has human skills.