Askia Muhammad was the king of the Songhai Empire from 1493 until 1528. Which of these changes did Askia Muhammad implement in the Songhai government?

A. He granted all citizens of Songhai the right to vote.

B. He changed the government from a monarchy to a democracy.

C. He eliminated taxed and reduced government services.

D. He introduced laws which were based on the teachings of the Quran.