Abenefit of using good human relations is that you'll

A benefit of using good human relations is that you will ADJUST TO NEW SITUATIONS BETTER. 
Human relation refers to a discipline that have to do with interpersonal relationships and behaviors. Having good human relation behaviors add tremendously to every aspect of our lives and improve our relationship with other people. For instance, in the work place, good human relation can help one to achieve career success. Knowing how to get along with other people aid us in resolving conflicts, communicate well, manage relationships, and make good decisions. 

Iwould say c. take responsibility for your behavior

The talk test measures ease of speaking during exercise;