A: Are your books in the bookcase?

B: _____. They're on the desk.[ ]

A. No, it isn't

B. Yes, it is

C. Yes, they are

D. No, they aren't

（）的功能是保护消防员在灭火战斗和营救人员、物质的过程中免受伤害，正常发挥应有的战斗力。

A、消防员个人保护器具

B、救助器具

C、个人装备

D、灭火装备