The resource based perspective indicates that firms exhibit different performances within the same industry because

c) some firms have superior resources

Explanation:

The resource based perspective aims to show that in an industry a company can make above average returns due to the superior resources it possesses that enables it to maintain a competitive advantage.

Some of these resources include people skills and technical know-how. For instance, a company might have better skilled computer programmers than others in the industry which will enable them produce better applications that they can use to corner the market.

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