Can anyone answer the questions down below?

first they came for the socialists, and i did not speak out — because i was not a socialist.1
then they came for the trade unionists, and i did not speak out — because i was not a trade unionist.2
then they came for the jews, and i did not speak out — because i was not a jew.
then they came for me — and there was no one left to speak for me.
1.
part a: which of the following best describes the message of the quote?

a
people should define themselves by their similarities, not by their differences.
b
fear can cause people to stop caring about others or their suffering.
c
people should speak out when they see injustice, or they may risk experiencing it themselves.
d
staying silent while witnessing a crime is the same thing as committing the crime.
2.
part b: which of the following best support the answer to part a?

a
“first they came for the socialists” ( line 1)
b
“because i was not a trade unionist” ( line 2)
c
“i did not speak out — because i was not a jew.” ( line 3)
d
“then they came for me — and there was no one left to speak for me.” ( line 4)

3.
what does the phrase “because i was not” emphasize about the speaker?

a
the speaker is lonely and distanced from the rest of society, which is why he did not speak out.
b
the speaker is deeply sorry and wants to justify why he did not speak out against the arrests.
c
the speaker regrets not speaking out because he was not being targeted and ignored those who were.
d
the speaker is a selfish, prejudiced person who did not care about the suffering of other people.
4.
how does the repetition used in the text contribute to its overall meaning?