What does area III on the map indicate? A. Northwest Territory B. Mexican Cession C. Texas Annexation D. Oregon Country

Mexican Cession

Explanation:

I had this same question and this was the correct answer. IV is Texas annexation, I is Oregon country( for some reason), II is Louisiana purchase and III is Mexican Cession.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.