If the market prices of each of the 30 stocks in the Dow Jones Industrial Average (DJIA) all change by the same percentage amount during a given day, which stock will have the greatest impact on the DJIA（）

A. The one whose stock trades at the highest dollar price per share.

B. The one whose total equity has the highest market value.

C. The one having the greatest amount of equity in its capital structure.

在金融系统中，直接经营各种存贷业务的是( )。

A．中央银行

B．商业银行

C．保险公司

D．证券公司