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Which sentence is correctly punctuated using commas?



Christmas, trees, cozy sweaters, and warm hot chocolate are three of my favorite things about December.


Christmas trees, cozy sweaters and warm hot chocolate are three of my favorite things about December.


Christmas, trees, cozy, sweaters, and warm hot chocolate are three of my favorite things about December.


Christmas trees, cozy sweaters, and warm hot chocolate are three of my favorite things about December.

Answer :

The last one

Christmas trees are one thing so it needs a comma after trees not Christmas; cozy sweaters are one thing so it also needs a comma after sweater; and that cancels out the first three.