Abby and sophie were in charge of bringing treats to their respective class parties. abby decided to bring cupcakes for the boys in her class and brownies for the girls. sophie brought hershey bars and skittles for everyone in her class. they both took surveys of their classes afterwards, to see which treats were liked best. what common factor did abby and sophie both use in their experiments? a) the type of treat brought b) there was no common factor c) the amounts of treats brought d) the type of recipeints surveyed