She was offered a cigarette but Brianne knew the dangers of smoking.
I would like to know why she turned down the cigarette.
Because - she avoided cancer in the early stages of her life.
Smoking is a personal preference and it is good to turn down a cigarette if one is offered and you are not interested. Smoking can lead to numerous health issues and so it is is not a good idea to start smoking.
I think that if you are a generally healthy person that you can still smoke.
While you might think you are a healthy smoker, smoking cigarettes is very harmful. It is good that she turned down the offer of a cigarette and you should think about doing the same.