Which of the following would it be most useful to determine in order to evaluate the argument? A. Whether the spiders' own ability to discriminate color-camouflaged species is as acute as that of their predators B. Whether the spiders have a color that could properly be regarded as their natural color C. Whether the spiders' color-changes allow them to remain undetected by prey D. Whether different species of color-changing spiders tend to favor different species of flower E. Whether the color-changing spiders prey on any insects that themselves change color