Answer:
b. to convince people that the German government was unrepresentative of its people.
The bombing of Pearl Harbor brought the United States into WW2. The United States stayed out of the way until this event because it was the breaking point for the nation. America had been attacked without what they deemed was a good reason and hundreds had been killed and injured.
Significant conversions also occurred beyond the extents of the empire such as that of the Turkic tribes in Central Asia and peoples living in regions south of the Sahara in Africathrough contact with Muslim traders active in the area and Sufi orders.