What role did imperialism play in causing WWI? (How could you tie this back to the Berlin Conference?)

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

where is the picture?

d is the right answer