How can the figure below be changed so that it has exactly one line of symmetry?
Multiple Choice

Move point A one unit up.
Move point B one unit down.
Move point C one unit to the left.
Move point B one unit to the left.

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas