It would be that "C. "He has made her morally, an irresponsible being, as she can commit many crimes with impunity, provided they be done in the presence of her husband[.]" that was least likely to gain support from most people, since this had a negative impact on people from all walks of life.
The white and black were segregated and it was very frowned upon when both colors were seen together so they made many signs pointing out the fact that different places were for different people.
I believe 1 of them were japan it only says japan was the only one of koreas possession at the time
There are 4 overall reasons why I believe you are correct.
1) The poem of Langston Hughes is clearly about African Americans as seen in the second verse:
"I am the darker brother."
2) They were mistreated during the time:
"They send me to eat in the kitchen
When company comes,"
3) The reason I agree with your answer is that towards the end of the poem Hughes starts talking about how the "darker brother" will be able to sit alongside 'them'
"Tomorrow,
I’ll be at the table
When company comes.
4) At the end of the poem he clearly states that they will be ashamed, so yes, your answer is A.
"And be ashamed—"
Hope this helped!