The correct answer is A. Barring ex-Confederates from holding political office
D. Is the correct answer. A and B are false because they tell you "the US fought from the beggining of the war to the end" and C is false because the US did participate in the war.
Someone killed some dude in a car with his wife
That he may benefit from the initiative and therefore may be biased. also that his facts are probably correct.