煤矿井下作业环境恶劣，危险因素多、职业危害严重不表现在（）

A.光线不足、噪声大 

B.阴凉潮温、风速大 

C.设备繁多、体积大 

D.辐射源多、辐射大

In relation to the formation of a company explain:

(b) a pre-incorporation contract, and its legal consequences. (5 marks)