Warren is a heavy smoker who suffers from a frequent "smoker's cough." The cough worries him, and he knows on a conscious level that it is the result of his smoking habit. He has not actually made any moves toward changing his behavior, but he has thought a lot about it and worrying about what will happen to his family if he does not stop smoking. If Warren's behavior is viewed according to the transtheoretical model, which stage of change does it best fit?
Preparation
Contemplation
Maintenance
Pre-contemplation