问题如下图：
选项：
A. 
B. 
C. 
解释：
请问老师这个na ge哪个知识点～
谢谢
NO.PZ201809170400000201问题如下 Whiof Tong’s statements regarng equity inx benchmarks is (are) correct?A.Only Statement 1B.Only Statement 2C.Both Statement 1 anStatement 2B is correct. The three requirements for inx to become the basis for equity investment strategy are ththe inx (rules base (transparent, an(investable. Buffering makes inx benchmarks more investable (Statement 2) making inx transitions a more graanorrly process.A is incorrebecause basing the inx weight of invisecurity solely on the totnumber of shares outstanng without using a free-floaustment mmake the inx less investable. If a stomarket cexclus shares helfounrs, governments, or other companies, then the remaining shares more accurately reflethe stock’s true liquity. Thus a free-floaustment (Statement 1) to a market inx more accurately reflects its actuliquity (it es not lower its liquity). Many inxes require thinvistocks have floanaverage shares traabove a certain percentage of shares outstanng.排除法做对的，知道buffering有降低调构成的成本的作用，但如何理解buffering使得组合more investable？
NO.PZ201809170400000201 Buffering makes inx benchmarks more investable (Statement 2) making inx transitions a more graanorrly process. 对于这句话的理解不够深入，请指点。 在之前听课的理解中，investible仅仅意味着“好买还是不好买”，也就是流动性问题。 而buffering解决的是“减少rebalancing”，也就是降低cost的问题。 这两件事不在一个层面上，为什么buffering能牵扯到investible？ 谢谢！
NO.PZ201809170400000201 能一下statement1吗
NO.PZ201809170400000201 把流通盘调整后（剔除），发现可以交易的难度提升了，意思不就是说流动性对于投资者不好了？
NO.PZ201809170400000201 第一句话应该修改成 提高流动性 是不是就对了？ 第二句话能帮忙下吗
