I would answer with C. because it is stating that students should have a more low-carb high-vegetable base meal plan in school lunches. This fits the negative tone of the sentence and agrees with it, so this would be the answer.
A. could technically be correct, but it does not flow with the tone of the sentence, as it has a negative connotation
B. Doesn’t have anything to do with the topic sentence, obviously elimination.
D. also doesn’t have anything to do with the topic sentence. Wrong because there is nothing mentioned about meat or organic foods.
The tone is thoughtful while the mood is mysterious.
Answer:
It is a simple past tense.
Explanation:
If it should be continuous tense, then it would be “Have eaten”.