On the coldest winter days , I wear a sweater under my coat mittens and a scarf Which version places commas correctly in the sentence ? On the coldest winter days , I wear a sweater , under my coat mittens , and a scarf . On the coldest winter days , I wear a sweater , under my coat , mittens , and a scarf . On the coldest winter days , I wear a sweater under my coat, mittens , and a scarf . On the coldest winter days, I wear a sweater under my coat , mittens and, a scarf.​