In this question, the last option is incomplete here are the complete options:
What is the best thesis statement for this argument?
A. Some of our students are not allowed to eat certain foods and must skip lunch.
B. Many schools in nearby districts offer a variety of meal options to their students.
C. Schools should not be allowed to sell high-fat desserts to students.
D. Our school needs to offer several selections for food at lunch.
The answer to this question is D. Our school needs to offer several selections for food at lunch.
Explanation:
In the argument, the speaker focuses on explaining how the school offers only one option and this has negative effects, including students skipping lunch; this idea is exemplified by pizza as the author explains pizza is too greasy and many students skip lunch when pizza is offered at lunch. Moreover, at the end of the paragraph, the author states "If we had more meal options at lunch, we could choose foods that left us feeling better", which shows the main position of the author or thesis statement is the need for more options at lunch (sentence D).