Answer:
Discard any food left out at room temperature for more than two hours.
Place food into containers and immediately put them in the refrigerator or freezer.
Step-by-step explanation:
The FDA recommends the 2-hour rule to prevent people from getting bacteria that grow on the food within that time period (if longer). This can lead to illnesses.
Once you're done eating, it is safe for you to put the food into containers so that bacteria cannot be grown on them. But you should be wary, the containers might be a bit of a problem if the food is too hot or if it's not cleaned well.
"Place leftovers that you intend to eat seven days from now into the refrigerator." This is an unhealthy decision because it can lead to bacteria growing on the food within that time, this also goes with "Put leftover food on plates directly into the refrigerator."
"Throw the leftover food in the trash right away, as it is no longer safe to eat." This is not always the case because sometimes the food might've been out for only just half an hour (or any time less than 2 hours).