D neither a nor b is right
Explanation:
Haddock et al. (1998) stated that social factors are the strongest predictors of tobacco use; for example, having friends who smoke and view smoking as attractive significantly increases one's own risk of smoking.
The answer is A. selecting a variety of foods at each meal
Our body need a wide variety of nutrition that is impossible to obtain from only one source of food
In order to balance our nutritional intake, we need to eat a healthy-selected different variety of foods
