South vietnam
a. was defeated by north vietnam in 1975.
b. invaded north vietnam and defeated the communists in 1976.
c. made a separate peace treat with north vietnam in 1974.
d. remains an independent nation to this day.

answer: the unlawful use of violence and intimidation, especially against civilians, in the pursuit of political aims.

explanation:

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 % " .

the is the answer a