The Missouri Compromise drew a line north of which any new states would be free states and south of <span>which any new states would be slave states. A is correct!
By the way, Marbury v. Madison was about declaring laws unconstitutional. (B is wrong) The American system was an economic plan (C is wrong), and the Monroe Doctrine concerned the US's presence in foreign nations (D is wrong).
Answer: Missouri Compromise</span>
Answer:
The Persian Gulf was an important transportation route in antiquity but declined with the fall of Mesopotamia. Nearly 50% of the world's total oil reserves are estimated to be found in the Persian Gulf. It is also a large fishing source and was once the chief center of the pearling industry.
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