Which is the difference between proximal and distal positions?
A. "Proximal" refers to the part toward the back of the body and "distal" refers to the part towards the front of the body
B. "Proximal" refers to the part toward the front of the body and "distal" refers to the part towards the back of the body
C. "Proximal" refers to the part closest and "distal" refers to the part farthest to the center of the body
D. "Proximal" refers to the part farthest and "distal" refers to the part closest to the center of the body