Multi-select problem: How does the next paragraph end?

How to tell if a goat is pregnant
Wash your hands first.
Thoroughly wash your hands with soap and warm water. Make sure to scrub for at least 20 seconds.

Choose your answer from:
(A). This will wash away dirt and germs from your hands and to decrease the likelihood of bacteria on your hands. Do not use detergent meant for sensitive skin or use salt.
(B). You can introduce bacteria to the goat, which have open glands around the teat. Plus, you don't want to introduce excess bacteria to the milk sample.
(C). Make sure you are not rubbing your baby's tummy, or else you might cause further discomfort. Vinegar can also make bacteria and fungi develop.
(D). This can help detect any concerning pesticides on your hands. Look into the goat's belly.
(B).