How did the Union blockade affect the South? (Check all that apply) A. It helped the south establish a trade relationship with the North.
B. It weakened the economies of Southern states
C. It caused a scarcity of available manufactured goods in Southern states
D. It limited the export of the South’s valuable cotton crop
E. It helped the South win the war

I think that From there No A or No C Or No E is the correct answer

the correct answer is:   "   3.6 % " .

          →   the unemployment rate is:   " 3.6 % " .

explanation:

to calculate the "unemployment rate" :

the "unemployment rate"   =

  [# of people unemployed] /   [working age population]   * 100 %   ;

                =   [9 million] / [250 million]     *   100 % ;

    →     note:   the units of "million" cancel out;

                    since:   " {million} / {million} = 1 " ;

                =   (9 / 250)   * 100 %   ;

                = 0.036 * 100 % ;

                =   3.6 %

answer:   the unemployment rate is:   " 3.6 % " .