Mansa Musa depended heavily on the gold trade for his power.
<span>Mansa Musa depended on a series of local city networks for his power. </span>
<span>Mansa Musa used his connection with the Christian rulers to achieve power. </span>
<span>Mansa Musa encouraged an isolated network of trading cities for his power.</span>
It was mainly "the automobile industry used the substance to power cars and trucks," that was <span>boosted by oil being extracted here, since gasoline is derived from oil. </span>
C) populism
For future reference: an easy way to remember the causes is to use the acronym MAIN (as in the MAIN causes) to remember that they are militarism, alliances, imperialism, and nationalism.
Hope this helps :)
