Global air and water temperatures have increased during the past ten years. Sea ice is melting faster every summer. Less and less of the polar ice caps are frozen all year long. Polar bears use the sea ice to get their food. How has the change in global temperatures affected the behavior of the polar bear?

A. Polar bears are growing shorter fur so they don't get too hot

B. Polar bears are moving off the sea ice and onto land and eating different kinds of food

C. Nothing has changed at all