Critical Reasoning

Marine biologists have long believed that the Scottish Salmon developed its distinctive shiny tailfin as a way to confuse its predators by reflecting light from the sun off of its tailfin and into its predators' eyes, causing the predator to become disoriented and lose the fish. New evidence shows that this cannot possibly be the case, as scientists have observed that the shiny tailfin attracts a bird of prey called the Red Wing Hawk through its reflection of the sunlight, which catches the attention of the bird above and causes it to swoop down and devour the fish.
Which of the following, if true, undermines the conclusion above?
A. Red Wing Hawks have only within the past two years started to inhabit any geographical areas in common with the Scottish Salmon.
B. Red Wing Hawks are one of many bird species to prey upon the Scottish Salmon.
C. The color of the tailfin of the Scottish Salmon is nearly the same color as that of a large sea plant very common to the regions in which most of the fish live.
D. The tailfin of the Scottish Salmon acts as a decoy which attracts minnows, a main source of food for the fish.
E. Red Wing Hawks have relatively poor eyesight in comparison with other birds of prey that primarily prey upon fish.