The author associates the issue of global warming with that of smoking because ________

The author associates the issue of global warming with that of smoking because ________.

[A] they both suffered from the government’s negligence

[B] a lesson from the latter is applicable to the former

[C] the outcome of the latter aggravates the former

[D] both of them have turned from bad to worse

请帮忙给出正确答案和分析，谢谢！