What was the main cause of the islamic world's hardships during the thirteenth century?

a) dissension between rival factions of islam
b) famine and diseased introduced from africa
c) western europeans invading muslim lands
d) mongol tribes invading muslim lands

martin luther king (1929-1968) was an activist for the african american rights, mr. king has a profile of a kind leader that built a tenacity, respect and full of hope future. he was an activist through civil disobedience and no violence pressure mechanisms. he tried to build a more egalitarian and fair society. his efforts carried a reivindication message of the civilian rights to every west corners. for that reason, he won the nobel prize in 1964.

it provided for equal trade rights among nations in china.