Paula is making a sourdough starter. Should she keep the starter in an airtight container?
A.
No, because yeast is a living organism and therefore needs oxygen.
B.
Yes, because an airtight container will eliminate the risk of contamination.
C.
Yes, as long as the airtight container is placed in the refrigerator or freezer.
D.
No, because yeast is found in the air so an airtight container would contain little yeast.
