Jon and bryan conducted an experiment to determine which color mussels the blue crabs preferred to eat. the boys varied the color of the mussels provided for food: white and dark gray. they also used assorted sized mussels. in all of the trials, the crabs ate the medium sized mussels, and chose the white mussels over dark gray only if they were medium sized. the boys concluded that the crabs prefer the white mussels. identify a condition of the experiment that might influence further conclusions.