How Has the Ability of Humans to Cooperate Been Reflected

Multiple Choice

How has the ability of humans to cooperate been reflected in the human response to climate change?

A) There has been little or no cooperation.
B) There has been cooperation within a few nations only.
C) Several international scientific groups have been formed to work on the problem.
D) Most national governments have agreed that tackling climate change is the world's most important challenge.
E) Most national governments have agreed that sustainable,steady-state economies must replace continual economic growth if we are to solve climate change.