When crops failed during some years in the Medieval period, areas of Europe experienced?

the answer to this question is the third option. hope this

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.