Which is true of the standard form of the equation of the line graphed?

A) The value of A can be –1 if the value of C is 3 and the value of B is 0.
B) The value of A can only be 1, the value of C can only be –3, and the value of B is 0.
C) The standard form of the equation can be shown as 3x = –9.
D) The standard form of the equation can only be x + 3 = 0.