Respuesta :
The 4th option because it makes the most sense. Whenever you get a question like this read all of the options out loud to figure out which option makes the most sense.
Answer:
Ben enjoys barbecuing, his friends, and his dog.
Explanation:
The chosen statement includes a list of items that Ben enjoys, so they must be separated by a comma after each one is named. In that respect, when naming items in a list, the coordinating conjunction and is placed before the last item.
The rest of the sentences are incorrect because the misplaced commas make them confusing and senseless.