问题详情

It can be concluded that
A．raising the world" s temperature only a few degrees would not do much harm to life on earth
B．lowering the world" s temperature merely a few degrees would lead many major farming areas to disaster
C．almost no temperature variations have occurred over the past decade
D．the world" s temperature will remain constant in the years to come 请帮忙给出正确答案和分析，谢谢！