Which sentence best shows a comparison and contrast?

A. The cells around the perimeter of the wound literally "divide and conquer."
B. They split off from adjacent cells and begin to divide and multiply.
C. As the cells multiply, they begin to travel across the wound, converging with other cells.
D. For most small wounds, after several days a bridge of new skin cells will have formed over the wound; however, this process may take slightly longer for broader wounds.