The answer is C because it is the only one that actually restricts the people. the other two are positive answers
D because in the text it doesnt say that she already did the problem so thats an implicit detail.
I am stuck on this same thing and no one
seems to help <span />
Joans Edward Salk became famous for developing a polio vaccine?
Polio is a contagious disease that has mostly been eradicated
In the 1940,s, polio was widespresd.
