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.