The federal government took which of the following measures to end southern resistance to desegregation?
I. sent in the National Guard to force schools to desegregate
II. closed southern school systems until they agreed to desegregate
III. provided financial aid for schools that integrated
IV. withheld financial aid from schools that refused to desegregate
A. I and II
B. I, II, and III
C. I and III
D. III and IV
E. I, III, and IV
