Dr Jones Is an Archaeologist Who Studies the Skulls of Human

Dr. Jones is an archaeologist who studies the skulls of human beings who lived thousands of years ago. He has found that many such skulls had circular holes where part of the skull was missing, and reads that this may have been a form of medical treatment called trepanation. Dr. Jones also concludes that some of these patients must have survived this surgical procedure. Which evidence would support this conclusion?

A) drawings and photographs of people who survived the procedure living with a reduction in their symptoms
B) writings that were preserved from those who underwent and survived the procedure
C) the existence of cracks leading up to and surrounding the surgical skull hole
D) growth of the skull bones after the procedure