<span>There are a small number of boys who, after possibly contracting mumps, could experienced decreased fertility in the future. Giving a mumps vaccine, since it's a weaker version of the virus, will allow the body to fight it off without the negative effects that could come with a full version of the illness.</span>
Answer: C the Montgomery bus boycotts is a prime example
I think D because the whole thing is gaseous and it has two atmospheric layers
