Answer:
Improve sanitation facilities by providing toilets and latrines that flush into a sewer or safe enclosure. Promote good hygiene habits through education. Proper hand washing with soap and water can reduce diarrhea cases by up to 35 percent.
Explanation:
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The correct answer is A.
It's is short for it is.
Use its to show possession. For example in sentence B, it's should be its because the dog is the 'owner' of the tail.
If the book uses words such as "I" then its first person
If it uses "he, she" its third
If it uses "you" its second.