DR. SMITH IS A GOOD SURGEON. HE LIVES NEXT DOOR.A. DR. SMITH THAT L...

4. Dr. Smith is a good surgeon. He lives next door.a. Dr. Smith that lives next door is a good surgeon.b. Dr. Smith, who lives next door, is a good surgeon.c. Dr. Smith who lives next door is a good surgeon.d. Dr. Smith, whom lives next door, is a good surgeon.