Which of the following is correctly matched to a stage of the transtheoretical model? a. preparation stage: "stress causes me to crave a cigarette, so i use yoga me relax." b. maintenance: "for the last year, my friends and i go golfing every sunday instead of spending the day drinking beer at the pub." c. contemplative: "the risk for exposure to chlamydia is highest in my age group, so chances are i am going to get it. there's nothing that i can do about it." d. all of the above are correct examples of the stage.