Which of these factors played an important role on the fall of the kingdom of ghana
a. a neighboring army invaded and colonized ghana.
b. merchants created new trade routes around ghana.
c. ghana lost all its fertile land to nomadic farmers.
d. ghana's people revolted and demanded a democratic government.

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies