The bubonic plague caused mass death and it was caused by the lack of sanitation systems throughout medieval towns. The peasants/serfs demanded more and more as the rich people needed more to supply themselves. Eventually, the peasants got a say in government for this. The bubonic plague also caused a lot of the roman empire to die.
Iran voted by national referendum to become an Islamic republic on 1 April 1979 and to formulate and approve a new theocratic-republican constitution whereby Khomeini became supreme leader of the country in December 1979. The revolution was unusual for the surprise it created throughout the world.
Answer:
<em>D. A memoir written by British prime minister Margaret Thatcher about her career</em>
