Answer:
Birth
Explanation:
Traditionally, a person's caste is determined at birth and channels them into that caste's occupation.
Holocaust was the primary reason the United nations called for a convention on prevention and punishment of Genocide in 1948.
The United States became more deeply involved in Vietnam in the late 1960s.
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➷ I would assume it to be B. i and ii. I wouldn't see any reason for an active American citizen to be involved with worldwide matters.
➶Hope This Helps You!
➶Good Luck :)
➶Have A Great Day ^-^
↬ Hannah ♡