What did citizens of both the confederacy and the united states realize at this time?

Its either b or c   i'm leaning towards b though i've heard of them during that time period 

D  at the cost of may lives  hobe this ask more questions if you neet to

Well, by looking at your question and also your answers that you have provided your answer to your question is going to be choice a) protestants.this is because they had been a member of or follower of any of the western christian churches. these churches had been separated  from the roman catholic  church and they follow the principles  of reformation, and baptism, and also the luthern churches, and finally  the  presbyterian.i hope this mark me as brainiest