Phanat Was Telling His Classmates About Scientists Finding a Region

Phanat was telling his classmates about scientists finding a region in Siberia where a million square kilometres of permafrost was melting.This was followed with his assertion that runaway global warming and worldwide social,economic,and environmental devastation was imminent.What was Phanat arguing?

A) that the Earth's environmental system had reached a tipping point
B) an apocalyptic environmental perspective
C) a nonrenewable resource position
D) the perspective of a risk society theorist