Answer:
To reduce waste you should only cook the amount you will eat and store the products properly.
Clearly, Carol is not correctly using a recipe.
Step-by-step explanation:
To reduce waste you should only cook the amount you will eat and store the products properly. This way you will eat everything you cook, preventing you from throwing away food. Also, by storing the feeders properly you will prevent them from spoiling and you have to throw them away.
Carol is not following the recipe correctly, so she can't get the proper taste of her sandwich. In addition, she wastes a lot of food as she cooks more than she can eat, and how she uses the recipe incorrectly. Carol ends up not liking the sandwich and wastes more food.