The is should be C, Im not 100% sure though...
In biology, the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction. The active site consists of residues that form temporary bonds with the substrate (binding site) and residues that catalyse a reaction of that substrate (catalytic site).
One good reason would be that they could give someone, or many people who are in desperate need of a new organ, a second chance at life.
Answer:
d
Explanation:
I have the answer I learn about it