Context: Jaylen starts to make a sandwich, but he sees mold on the bread! He wonders what factors affect how mold grows on bread. So, he decides to design an experiment. He has the following supplies available:
two loaves of white sandwich bread
a small plastic bag
a large plastic bag
a refrigerator
Using only these supplies, which question can Jaylen investigate with an experiment?
A. Does white or whole wheat sandwich bread grow visible mold in fewer days?
B. Does white sandwich bread grow visible mold in fewer days if the bread is stored inside or outside the refrigerator?
C. Does white sandwich bread grow visible mold in fewer days if the bread is stored in a paper bag or in a plastic bag?
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

B