Which statement about the relationship between bacteria and the human body is most accurate?
A) Although many tissues are kept bacteria-free, around 100 trillion bacteria live on or in us.
B) Most bacteria are transient; that is, they come for brief periods and then are gone.
C) About one-tenth of our body weights are due to bacteria
D) Bacteria are found in the mouth, stomach, and intestines in about equal amounts.
Answer: A
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