There is not a specific antonym for diaspora, but the opposite of a diaspora would be the regrouping of a community or the coming together of a community. It could also be a renewal of a specific cultural group or ethnicity coming back together in a sort of revival of their culture.
Answer:
C a bill passed by both houses
Answer:
B
Explanation:
The Prompt mentions the history of aviation and the people involved and answer B states that explicitly.