这道题怎么理解？

问题如下：

Question

选项：

A.only its competitors.

B.only its historic margins.

C.both its competitors and its historic margins.

解释：

1. Incorrect because Porter’s five forces framework and similar analytical tools can help analysts assess the relative profit potential of a company by helping analysts estimate whether profit margins are likely to be relatively high or low (relative to historical profit margins and relative to competing companies).

2. Incorrect because Porter’s five forces framework and similar analytical tools can help analysts assess the relative profit potential of a company by helping analysts estimate whether profit margins are likely to be relatively high or low (relative to historical profit margins and relative to competing companies).

3. Correct because Porter’s five forces framework and similar analytical tools can help analysts assess the relative profit potential of a company by helping them understand the company’s industry and its position within that industry. Understanding the industry and competitive contexts of a company helps analysts estimate whether, for example, sales growth is likely to be relatively high or low (relative to history, relative to the overall growth in the economy or a sector, and/or relative to competing companies) and whether profit margins are likely to be relatively high or low (relative to historical profit margins and relative to competing companies).

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