Developing and improving communication skills will ensure that messages are sent and received properly.

This statement is true.

This statement it true because improving communication skills means that the sender and receiver will understand each other better. 

But when in doubt, eat a pineapple, trust me it helps :P

The answer i think would be diet coke

Behavioral science is the study of human behaviors and how they can be influenced.  by examining patterns in behavior as well as reactions, individuals with behavioral problems can be more adequately treated, resulting in greater mental health of our society/the public.