Context: Kevin enjoys feeding the squirrels in his backyard. He notices that they spend a lot of time collecting seeds and nuts. He wonders about what factors affect which foods squirrels choose to collect. So, he decides to design an experiment. He has the following supplies available:
two identical squirrel feeders
a bag of sunflower seeds
a bag of walnuts
a tree to hang the feeders from
Using only these supplies, which question can Kevin investigate with an experiment?
A. Which type of tree do the squirrels feed from most often?
B. Do the squirrels eat walnuts from large feeders more often than from small feeders?
C. Do the squirrels select sunflower seeds or walnuts more often?
Select the correct answer from the provided options and reply with the letter associated with it.

C