World War 2 occurred in the late 40's, so this is most likely why there is a dip in that age group.
The answer to your question is a
I think its B C D are the ones that fit the most
Individuals who migrate experience multiple stresses that can impact their mental well being, including the loss of cultural norms, religious customs, and social support systems, adjustment to a new culture and changes in identity and concept of self.
