C and D do not factor into characterization.
Answer: It might force him to brag
Explanation: The reason why Jonas cant congratulate the boy is because it might force the boy to brag.
"In" is a preposition.
·In their exploration
·in their sacrifice
"Of" is a preposition.
·of the world
"To" is a preposition.
·to feel as one
Tell me if you think I missed any.
Answer:
March on Washington
Explanation:
see https://www.history.com/topics/civil-rights-movement/i-have-a-dream-speech