The answer is A because when they are a adult
In order to determine if you are using the proper amount of sanitizer in a solution, it is best to check it with the use of test strips or with concentration techniques that will help you in determining if you have the proper amount. It is also best to change if often in order to have the best result and correct or reliable amount.
Answer:
The word demography comes from two ancient Greek words, demos, meaning “the people,” and graphy, meaning “writing about or recording something” — so literally demography means “writing about the people.”
