Which of the following is the best definition of mutation?
pres
o
a. the visual appearance of an organism
o
b. a damaged protein
o
c. a harmful change to an organism's phenotype
od. a permanent change in dna or rna

It should be D

Explanation:

A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.

the correct answer is - ability to find a mate