Jane is honest and never tends to hide her opinion. She must give you a(n) _____suggestion about it.  

A．abrupt

B．ambiguous

C．straightforward

D．hesitant

写出下列反应的化学方程式，并注明反应类型：

(1)乙烷和氯气反应产生一氯乙烷：                                      

(2)乙烯和溴水的反应：                                                 

(3)丙烷燃烧：