The question below contains four statements. Indicate the sequence which correctly assembles the statements and completes the paragraph.

A. The team based their claims on finding similar holes in two human skulls in France from the same period.

B. To practice before being done on humans or save the cow's life.

C. They were however unsure whether the surgery was performed.

D. French archaeologists have uncovered a 5,000-year-old cow skull, claiming it as the earliest evidence of surgical experimentation on an animal.