While ken appreciates that as a result of his communication-based self improvement plan he will be a better person, he knows that the greatest benefit will be to

I had to look for the options, and the answer that best fits the blank provided above is this: BECOME A MORE EFFECTIVE WORKER. Since Ken shows appreciation of the result that he acquired from the communication-based self-improvement plan, he believes that the major benefit he will be getting is to become a more effective worker.

The answer might be c