PLS ANSWER QUICK! BRANLIEST!

Environmentalists claim that climate change could lead to major biological change on Earth. Which of the following statements supports the biological predictions related to climate change?


A Sea levels will fall, causing migration of 50% of the world's human population.

B Carbon dioxide levels and temperature changes are direct related in the studies.

C Studies show that atmospheric carbon dioxide has increased over the past 150 years.

D The distribution of many organisms has already shifted as a result of warming.