It might be dangerous because everyone breathes the same air. Peoples body’s can be weaker to others and could get sick if no fresh air is coming threw the class.
Answer: first two and last
Explanation: first one doesn’t need any commas because it is not awkward to read
Answer: D
Explanation: What Mother was saying was all one sentence.
Answer:
<em>Its an Aphorism. </em>
Explanation: