The main reason why the President would wanted to appoint a judge who is acceptable to the legislative branch is that judges need to be confirmed by the Senate in order to be fully appointed.
Answer:
Well a Republic Government is where the government supports the people of wealth instead of all the citizens of the country, kingdom, city-state, etc. So I would say that the answer would be (a).
Hope this helps, and if it doesn't I'm so sorry ;-;
--Koda
The answer is A, to restore the South to the Union as quickly as possible