Depending on if learning about the culture of spanish speakers or learning the language, because if they learning the culture of spanish speakers, they have to the food for sure.
Answer:
the problem with the other sentences is they are in the he/she form.
Explanation:
the correct ones are directed to you. you "don't eat the candy" but the wrong sentences are directed to he/she
"he doesn't eat the candy" and it's in the past. the correct ones are telling you to do something "don't eat the candy" and the wrong ones are saying that he/she doesn't do something. "he/she doesn't eat the candy... no come el dulce" the verb forms are different in both sentences.
hope this helps :)