Your Friend Is Wary of Environmentalists' Claims That Climate Change

Your friend is wary of environmentalists' claims that climate change could lead to major biological change on Earth.Which of the following statements should you use to support the biological predictions associated with climate change?

A) Studies show that atmospheric CO₂ has increased over the past 150 years.
B) CO₂ levels and temperature fluctuations are directly correlated in the studies.
C) The distribution of many organisms has already shifted as a result of warming.
D) Sea levels will fall,displacing as much as 50% of the world's human population.