Answer:
The correct answer is option c. "the relative fitnesses of the genes which encode the bright and dull coloration".
Step-by-step explanation:
Mytai lisgorgeous is a fictional species of bird characterized by the physical traits of the males, which have extremely long and colorful tails. If we want to predict the outcome of evolution in this species it will be most useful to study the genes related to the development of the colorful tails, in other words, the genes that encode the bright and dull coloration. The study of these genes will help us to understand at what time in history these birds developed its characteristic colorful tails.