To put it on a simple term, psychology is the study to know why our mind works.
Behavior is not the only thing covered by psychology. It's a huge factor of it, but not all of it.
Psychology also teach us on why people developed a certain opinion, how people developed a certain preference, how interaction with other people affect our minds, etc.
The answer is true, hope it helps :)
Answer: collaborating style.
The complete sentence reads: The colaborating style of handling conflict in a team reflects both a high degree of assertiveness and cooperativeness.
The conflict-handling styles are five: competing style, avoiding style, compromising style, accomodating style and collaborating style.
Each one relays on different balance of assertiveness and cooperativeness.
Competing style reflects assertiveness.
Avoiding style: reflects neither assertiveness nor cooperativeness.
Compomissing style: moderate amount of both assertiveness and cooperativeness.
Accomodating style: higher level of cooperativeness.
Collaborating style: high degree of both assertiveness and cooperativeness.
The answer would be B. A constitutional requirement.