Context: Tristan is baking a pie. He notices that the crust burns before the pie is fully cooked. He wonders what factors affect whether a pie crust will burn in the oven. So, he decides to design an experiment. He has the following supplies available:
ingredients for pumpkin pie filling
ingredients for apple pie filling
two pie crusts made with white flour
a glass pie pan
an aluminum pie pan
an oven
Using only these supplies, which question can Tristan investigate with an experiment?
A. Do pie crusts made with white flour burn less quickly when covered with aluminum foil or when left uncovered?
B. Does a pie crust made with white flour burn more quickly when the pie is cooked in a glass pan or in an aluminum pan?
C. Does a pie crust made with white flour burn more quickly than a pie crust made with whole wheat flour?
Answer with the option's letter from the given choices directly.

B