The correct construction is C. Construct the line passing through A and B.
A reflection maps a point to its image across a line. The image of point A is point B.
Therefore, the line of reflection must pass through both points A and B.
Option A, the perpendicular bisector of segment AB, will be perpendicular to line AB, not necessarily passing through point A.
Option B, a line through B perpendicular to segment AB, will not pass through point A.
Option D, a line parallel to line AB, will not pass through point A unless line AB is actually the line of reflection itself, which is not a valid option.
Therefore, only option C satisfies the requirement of passing through both points A and B, making it the correct construction for the line of reflection.