Which sentence correctly uses commas to separate a nonrestrictive modifier?
The man, who owned the floral shop, watered the shop's hanging plants.
O The young child-who is my nephew- is the cutest three-year-old ever!
O My friend John, who owns a chocolate Lab puppy, is getting ready to leave for a trip.
O The student, who aced the test, was excused from completing the homework assignment.