Jane and Jan Have Been Best Friends Since They Were

Jane and Jan have been best friends since they were four years old. Even though both women have married and are raising families, they remain best friends. Research by Christakis and Fowler (2007) suggests that if Jane becomes obese, ____.

A) Jan will try to help her lose weight
B) Jan will actually lose weight
C) there is a 171% chance that Jan, too, will become obese
D) there will, at most, a one percent effect on Jan's weight