Select the Statement That Describes How an Organism's Fitness Level

Select the statement that describes how an organism's fitness level and environment relate to one another.

A) The more suitable an environment is for an organism's phenotype,the higher the organism's fitness level.
B) An organism with a particular fitness level in one environment has the same fitness level in every environment.
C) The less suitable an environment is for an organism's phenotype,the higher the organism's fitness level.
D) The more suitable an environment is for an organism's phenotype,the lower the organism's fitness level.
E) The suitability of an environment for an organism's phenotype has no relation to the organism's fitness level.