What best describes the education and training cluster

Hello. This question is incomplete. The complete question is:

"Which best describes the education and training cluster?

Workers include plumbers and electricians.  Workers include doctors and nurses.  Workers include teachers, administrators, and professional support.  Workers include event planners, concierges, and hotel managers."

Workers include teachers, administrators, and professional support.

Explanation:

A cluster is a geographic agglomeration of interconnected companies, people, or professionals from specific and / or related segments. In this case, an education and training cluster is a cluster of companies or professionals that develop activities in the field of education and training for various individuals. For this reason, we can say that the best answer to your question is " Workers include teachers, administrators, and professional support."

the answer is c   it wants me to write more for no reason bu c is the answer