It's a and b because the question says what types
You usually start off with twenty baby teeth. If she is losing four each year you would divide the amount of baby teeth by four:
20/4=5
So she lost all her teeth by Five years of age.
PS. which is quite young!
The answer to this question would be achieving one's full potential. I hope this helped! :)
Answer:
to understand how negative side effects
might make a person feel
to understand how a new drug might affect
the body
