What is natural selection?

A: Scurvy is a disease caused by a vitamin C deficiency

B: the way these genes are selected for or against in nature to increase the reproductive survival (or fitness) of a population is NOT at all random

C: The breakdown of ethylene glycol by the enzyme alcohol dehydrogenase produces acidic compounds like oxalic acid, and formic acid which makes the body too acidic

D: the process whereby organisms better adapted to their environment tend to survive and produce more offspring.