B says "issues" (meaning more than one),
but I only found one...
"should countries act unilaterally to curb emmissions?"
And his answer is no, they should cooperate (even though it is hard).
What other ones does the author intend to answer?
I thought they could be...
"why should governments consider a carbon tax when they could control emissions by...in nuclear power?" (3~)-but I think this is not something they should consider before deciding whether to impose a tax...
or
"how high such a tax should be or what its economic and environmental implications would be"-although the author says it's unclear (so not sure it is something the author intended to answer...)
By the way, is this the author's primary purpose to write this passage?
Through the entire passage, I was not sure what his main point was and did not like any of the answer choices at first...
Thank you