Which of the following best describes the subject "world history” before the 1960s? Choose 1
The subject was introduced to college students only.
B
The subject was taught globally.
с
The subject didn't exist.
D
The subject had many different versions.

ask google there you might be able to find an answer for the question you're trying to ask

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

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.