（2014年安徽省合肥市高三第三次教学质量检测）23. -- Don't you think Carl was brave to go wingsuit flying?

-- Personally, I think he was ______. He shouldn’t have risked his life to do so.

A．as mad as brave

B．madder than braver

C．more mad than brave

D．brave rather than mad

人类在长期生产活动中产生了劳动分工，（）由此产生和发展。