John Endler's Experiment with Guppies Demonstrates Which of the Following

Multiple Choice

John Endler's experiment with guppies demonstrates which of the following in regard to evolution through natural selection?

A) Male guppies can change color depending on their environment.
B) There is one optimal set of traits for each species.
C) The reproductive success a trait imparts depends on the environmental context.
D) Bigger and brighter is always better.