Multi-choice problem: Choose from the options at the end, and answer how do you do this: How do I keep my freezer smelling fresh?

OPTIONS:
A). Open small container of yogurt and place open container in the freezer. Mark calendar to purchase new container in four months..
B). Open small slot of baking soda box top. Place baking soda box on freezer door. Mark calendar to purchase new box in four months..
B).