According to Chapter One, all of the following are attributes needed to communicate successfully with people from different cultures excepta. motivationb. tolerance for ambiguityc. friendlinessd. open-mindednesse. knowledge and skill

C). Friendliness.

Explanation:

As per the question, in order to communicate rewardingly with the people belonging to different cultures, all the given attributes are required except 'friendliness' as it becomes a secondary attribute while the others are a must while interacting with people belonging to diverse cultural backgrounds.

'Motivation' is highly recommended as people belonging to diverse backgrounds will posses their own uniqueness and etiquette that requires great strength to keep yourself motivated to handle the diversity positively. 'Tolerance for ambiguity' is another must feature as then only people would find it comfortable to interact with you. The 'open-mindedness' along with the 'knowledge and skills' is required to keep your own thoughts or perceptions aside (at the moment) and accept their culture whole-heartedly to make it convenient to communicate. Therefore, option B is the correct answer.