Jack went back home after a heated discussion, _______.

A．annoyed and tired

B．annoying and tired

C．annoyed and tiring

D．annoying and tiring

燃烧产生的条件是可燃物质、（）和火源三者同时存在。

A、氧气

B、氧化剂

C、火柴

D、助燃剂