Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Problem:[header] How to store baby formula [title] Clean your hands. [step] Wash your hands thoroughly before touching anything related to the preparation of your baby's formula. Allow your hands to air dry or dry them with paper towels. <sep> (A) Do not reuse dish towels to dry your hands, as they can harbor bacteria and other kitchen germs. [title] Clean the lids of formula cans or covers. (B) [substeps] If you are throwing the baby's formula away or eating it, do not drink any fluids until the baby is over two weeks old. The formula will not ferment properly and will not keep good after it has been stored. (C) [substeps] If using a cup, do not use a jar or container with a lid because this could contain bacteria or moisture. [title] Change the cap on your food and water bottle. (D) Make sure your hands are clean during the entire process, even after mixing and storing the formula, or before touching or cleaning your baby's formula. [substeps] Wipe or dry your hands with paper towels.
Solution:
A