The manner in which people carry themselves in terms of race and ethnicity is commonly referred to as a. heritage b. regionalistic customs c. cultural identity d. collective individuality e. ethnic background

YEAH YOU KNOW WHAT WE ON MAN 

c. cultural identity

Explanation:

People tend to act based on their culture and background, often this happens as a result of how their social life is locally and historically structured.

Cultural identity provides a framework for people to act on, with a strong feeling of belonging.

An example is the way they clothe, and how they portray themselves towards others, often to emphasize diversity towards others.

Any culture forms a particular way of belonging and then this is expressed in terms of visual or other iconic representations : think of the national flags identifying a nation, the anthems, the music around them, together they shape and form a cultural identity.

That statement is False
The term argumentativeness is mostly used to describe someone's willingness to confront a different opinion/approach.
The confrontation for this matter doesn't necessarily have to be vicious or destructive and could be done through a rational and open-minded approach.