1. The problem asks to identify which image shows a reflection of the original triangle. 2. A reflection is a transformation producing a mirror image of a shape across a line, preserving size and shape but reversing orientation. 3. Option A shows a triangle mirrored over a vertical line, which matches the definition of reflection. 4. Option B shows a rotation, which changes orientation but is not a reflection. 5. Option C shows a flipped or rotated shape but not a symmetrical mirror image. 6. Therefore, the correct answer is Option A, as it is the reflection of the original triangle.