What Did a 2015 Study by Stice and Colleagues Find

What did a 2015 study by Stice and colleagues find about young women whose motivations to smoke included weight concerns?​

A) ​Smokers lost more weight by dieting and smoking than by dieting alone.
B) ​Smokers actually gained more weight over time than nonsmokers gained.
C) ​Smokers lost equal weight from smoking as nonsmokers did from dieting.
D) ​Smokers actually lost less weight by smoking and dieting than by dieting.