Which of the Following Best Captures Broome's Main Argument in "Private

Which of the following best captures Broome's main argument in "Private Morality and Climate Change?"

A) Your greenhouse gas emissions will impose a significant risk of harm on other people. The lack of certainty about those harms is no reason to avoid reducing your emissions. Therefore, you ought to reduce your greenhouse gas emissions to zero.
B) Your greenhouse gas emissions will cause serious harm to many people. You cannot effectively prevent all of that harm because offsetting is ineffective and unjust. Still, you are morally obligated to reduce your emissions as much as you can.
C) Your greenhouse gas emissions will unjustly harm other people. You can easily prevent that harm by offsetting your greenhouse gas emissions. Therefore, you are morally obligated to offset your greenhouse gas emissions.
D) Your greenhouse gas emissions will seriously harm other people. Because of the number of people your emissions will harm, reducing or offsetting those emissions is the most effective and efficient way to make the world better. Therefore, you ought to reduce your emissions as far as possible and offset the rest of them.