Explanation:
Primary sources are evidence about what happen in that time, the person's evidence is primary because that person was there.
Secondary are like when somebody tells you something that he heard but he wasn't there.
The Berlin airlift, organized by the United States, was aimed at giving goods/resources to citizens of West Berlin. This airlift lasted roughly a year and the US provided over 2 million tons of cargo to these citizens. Without this airlift and support from the United States, West Berlin was in danger of falling under the control of the Soviet Union (who at this time already controlled East Berlin).
<u>Commoners in Hinduism as warriors:</u>
The commoners in Hinduism can become warriors and this does not make them to move up in the caste system.
Neither of the given statements fits to warriors. Anyone can become a warrior and this is not based on the caste system. In Hinduism, the people are grouped according to their habitation.
They had a clear cut vision in grouping that one who imparts knowledge is Brahmins, one who fights and protects people from enemies are Kshatriyas, one who does business is vaishyas and finally one who does the hard labor is shudras.
The warrior from any one of the groups will always remain in the same cult there won’t get upgraded or downgraded in the caste system which is derived according to the habitation. In this grouping, there is no discrimination every individual will practice their system of life.