There are many reasons why Zachary can't concentrate. He might have something on his mind that is bothering him, he could be hungry, he could not have a lot of energy. The best thing Zachary could do to help the paper not suffer is leave his desk and paper alone for about a half an hour, and maybe eat something, or just take a break. Maybe take a nap to get some energy back up so that he can get everything he needs in his paper.
The healthiest option would be the cheese because cheese contains both healthy and non-healthy fats, the second best choice would be nuts, although they contain more protein than fat.
Answer:
A. It describes how many daily total calories he should eat. He can compare this number to the number of calories he currently consumes.
Explanation: