If there isn't a fourth choice then i believe the correct answer would be "b" a governor cause a president has authority over everything and a mayor is mostly pinned to a town or city.
hope this helps and is what your looking for.<3
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One of the most important effect of the crusades was on commerce. They created a constant demand for the transportation of men and supplies. Hope this helped, have a great day! :D
Answer:
A
Explanation:
the first cause of decline was the arab war
