发生突发环境污染事故后，县级以上人民政府应当采取有效措施（），最大限度的保障（）。

Speaker A. Did you hear about those people who got hurt when going mountain climbing I think they shouldn't allow people to go mountain climbing. It's too dangerous.Speaker B: ______

A．I couldn't agree more. I can't understand why anyone wants to get to the top of a mountain.

B．I couldn't agree less. Mountain climbing is actually more dangerous than surfing.

C．I'm sorry to hear that. Where did you get the news

D．No, I have decided not to go mountain climbing with my friends next month.