During the mauryan rule, chandragupta introduced the system of a single currency across india. what was the effect of this currency on the empire? a. it reduced the risk of a rebellion within the empire. b. it created awareness of the mauryan empire in other countries. c. it made it easier for traders and merchants to trade goods. d. it chandragupta collect taxes from local villages.

Absolutely.

C. It made it easier for traders and merchants to trade goods.

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 % " .