请教一道og逻辑题，大家帮忙啊

mingming8152

one way to judge the performance of a company is to compare it with other companies. This technique commonly called "benchmarking," permits the manager of a company to discover better industrial practices and can provide a justification for the adoption of good practices.

any of the following, if true, is a valid reason for benchmarking the performance of a company against companies with which it is not in competition rather than against competitors EXCEPT:

1,comparisons with competitors are most likely to focus on practices that the manager making the comparisons already employs.

2,getting "inside" information about the unique practices of competitors is particularly difficult.

3,since companies that compete with each other are likely to have comparable levels of efficiency, only benchmarking against noncompetitors is likely to reveal practices that would aid in beating competitors.

4,managers are generally more receptive to new ideas that they find outside their own industry.

5,much of the success of good companies is due to  their adoption of practices that take advantage of the wpecial circumstances of their products or markets.

求大家帮我解释一下问题啊，是说与竞争对手之间进行业绩比较而不与非竞争对手进行业绩比较的原因，除了。。。

文中说了采用业绩比较的方法有利于公司的发展，问题问的是选项中不是进行业绩比较的原因？E说了很多公司的成功是因为在某些特定环境中生产的产品，言下之意和业绩比较无关，和产品处于特定市场有关？

其他的几个选项如何理解？