Ok, so I am guessing it is C, due to the fact that in Google, it state that, "Multiculture collaboration adds the challenge of overcoming the communication barriers of different cultures, ethnic heritage, values, traditions, language, history, sense of self, and racial attitudes." This quote does talk about attitudes and actions, so I am sure it has to be C.
Hope this helped!
Please Mark Brainliest
~Nate
