An important reason for constructing an investment policy statement is that it:()

A. minimizes the costs of portfolio construction.

B. ensures that managers outperform the performance benchmark.

C. includes a performance benchmark to judge manager performance.

分类目录是将各条分类款目依据一定的（）组织起来的目录，是从知识体系方面揭示图书馆藏书内容的重要工具。