Adoption of the Marshall plan in the 1940’s Cuban middle crisis in the 1960’s and then fall of the Berlin Wall in end of ‘80s early 90s
The answer is A) After the Iraqi Army was defeated, a costly civil war broke out, which President Bush hadn't planned for
The Varnas ordered from top (highest status) to bottom (lower status):
Brahmins (priests, teachers and scholars)
Kshatriyas (warriors, administrators and rulers)
Vaishyas (merchants and farmers)
Shudras (laborers)
Dalits (<em>avarna</em>)
As you can see, the Varnas are fundamentally 4. However there are certain tribes that don't belong to any Varna, such as the Dalits which are classified as <em>avarna</em>.
Hope this clears things up!