Using an absolute adjective in a comparative sentences makes your English sound strange so watch out! Another example of an absolute adjective is 'unique' because it means 'one of a kind' and, therefore, it can not be 'more unique' than something. It's either 'unique' or it isn't.
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D. Jules ate pizza, salad, and yogurt for lunch.
This is because A is correct but they made a tiny error, which is to add a comma before and. B is not correct because they had to add it before and C. is also the same problem but in D they used commas before and. HOPE THIS HELPS!!!!!