The answer is D. A Bacterium
Answer:D) college students are not randomly selected from the larger population, and they may not represent all young adults in our society.
Explanation:
There are 5 stages up to 18 years old then there is three more after that and there is 8 stages of development.
Maybe stretching? I don't really remember the answer so don't trust me!
Lung diseases and inhalation contamination
