A species of marine snails have either solid or striped shells. scientists found that 57 percent of the snail population was striped, and 33 percent was solid. sea birds are the main predator and when scientists studied their diet, they found that the birds ate more striped snails than solid snails. what could scientists conclude about the snails?
A) birds preferred the solid snails.
B) rates of predation determine shell pattern.
C) the shell pattern is due only to environmental variation.
D) there may be other factors in the ecosystem that favor striped snails.