C. Patriotism and loyalty; It was a benefactor for the civil war and was a main theme of the civil war
I would say B) and D) apply to some of the differences between a Prime Minister and a President and also A). In addition, a Prime Minister is head of the government but may not be head of the state which may be a President in the same country or perhaps a Governor General.
In a number line, the numbers on the right hand side of zero are all positive numbers (1, 2, 3, 4, ...). On the left hand side of zero are all negative numbers (-1, -2, -3, -4, ...). The numbers in the coordinates of the number line are all real numbers. Thus, the answer is letter A.
