Nato involved primarily which countries? a. italy, greece, turkey, and the united states b. canada, the united states, and western europe c. communist countries in eastern europe and asia d. developing countries in africa and asia

the answer is D, developing countries in africa and asia

i think the answer is b.

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.