Question

which sentence is punctuated correctly?
mrs. easton puts lettuce, cheese, sour cream, and jalapenos on her nachos.
mrs. easton puts lettuce, cheese, sour cream and jalapenos on her nachos.
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Explanation:

To determine correct punctuation, we use the Oxford (serial) comma rule. In a list of three or more items, a comma before "and" (Oxford comma) is optional but consistent in the first option. The first sentence has commas after "lettuce", "cheese", "sour cream", and before "and jalapenos", following the Oxford comma convention. The second sentence lacks the comma before "and", which is less consistent in formal writing for clarity.

Answer:

The first option: Mrs. Easton puts lettuce, cheese, sour cream, and jalapenos on her nachos.