Which of the Following Statements Is True About the Calculation

Which of the following statements is true about the calculation of the cost of insuring humanity against potentially catastrophic consequences of global warming?

A) The cost of preventive measures to reduce global warming would have a cost equal to about 50 percent of world GDP.
B) The cost of preventing global warming is comparable to the costs of routine types of insurance people willingly pay for, like insuring a house from total loss.
C) Most people accept the predictions of global warming, but they like the challenge of learning to live with a much warmer climate.
D) The cost of mitigating global warming is a halving of humans' standards of living, which explains why people are opposed to environmental policies.