To Lose Weight,Kelsey Started Using Whole Wheat Bread Instead of the Usual

To lose weight,Kelsey started using whole wheat bread instead of the usual white bread for making sandwiches.After following her new eating habit for six months,Kelsey does not even think about ordering anything but whole wheat bread sandwiches at restaurants.According to the stages of change model,this behavior is described as:

A) transcendence.
B) resistance.
C) self-actualization.
D) adaptation.