Which of the Sets of Statements Below Will Add 1

Multiple Choice

Which of the sets of statements below will add 1 to x if x is positive and subtract 1 from x if x is negative but leave x alone if x is 0?

A) if (x > 0) x++; else x--;
B) if (x > 0) x++; else if (x < 0) x--;
C) if (x > 0) x++; if (x < 0) x--;
Else x = 0;
D) if (x == 0) x = 0; else x++;
X--;
E) x++; x--;