Fast food industry representative: Many people blame fast food alone for the rise in obesity in the United States over the past thirty years. Yet clearly, sedentary lifestyles have also played a major role in this trend. In the past thirty years, the number of people who report exercising less than twice a week has risen sharply, and studies show that a sedentary lifestyle is the most accurate predictor of obesity.
In the fast food industry representative’s argument, the portion in boldface plays which of the following roles?
【选项】
It is the conclusion the argument seeks to prove.
选项是否正确？