What do all the islamic empires have in common? a. their leaders were descended from genghis khan. b. they all worked to promote the spread of islam. c. they used gunpowder brought from china. d. they had a policy of religious tolerance.

How did the war of 1812 contribute to an increase in u.s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.