Which of the Following Is the Best Evidence That Environment

Which of the following is the best evidence that environment must play a role in obesity?

A) the rate of obesity has been rising while the gene pool has remained relatively constant
B) the recognition that identical twins reared apart have body weights similar to their biological parents
C) the development of precise body composition methodologies that define adipose storage sites based on gender
D) the discovery of uncoupling proteins that explain the variations in energy metabolism among lean and overweight people