Brittany has been smoking tobacco cigarettes for a number of years. She no longer finds smoking pleasurable, and would like to quit, but finds the withdrawal symptoms too overwhelming. She smokes because a cigarette takes her cravings away. For Brittany, the act of smoking a cigarette is best thought of as

Brittany will just have to tough it out.

Explanation:

I was addicted to cigarettes as a teenager and as a young man. I quit smoking cold turkey in 1990 because I decided that the price of a pack of cigs was too high. Yes, it's difficult. Quitting smoking is agonizingly uncomfortable. It's three weeks of Hell followed by three months of Purgatory. But if I can do it, so can anyone else. People fail because they decide that their excuses for failure are acceptable. "I'm under stress just now," is an excuse that I often hear. People who make excuses will just keep on failing until they learn that there is no such thing as an acceptable excuse. That's all there is to it.

they produces sugar..

hope this , question was a little open ended