下述磺胺药中，蛋白结合率最低，容易进入各种组织的是（）

A.磺胺二甲基嘧啶

B.磺胺甲唑

C.磺胺嘧啶

D.磺胺间甲氧嘧啶

E.以上都不是

All else equal, a firm will have a higher Price-to-Earnings (P/E) multiple if:

A. retention ratio is higher.
B. risk-free rate is higher.
C. the stock's beta is lower