Which of the following embedded options most likely benefits the bondholde（）

A. Interest rate cap on a floating-rate bond.

B. Accelerated sinking fund provision.

C. Put provision at par on a bond that is trading at a premium.

搏出量占心室舒张末期容积的百分比称为（）

A.每搏输出量

B.心输出量

C.心指数

D.射血分数

E.心力贮备