Question: Any reflection is trivially a composition of reflections. Which of the following is true of rotations? A. Any rotation can be expressed as a composition of reflections across three lines whose single intersection point is the center of rotation. B. Any rotation can be expressed as a composition of reflections across two perpendicular lines whose intersection point is the center of rotation. C. Any rotation can be expressed as a composition of reflections across two lines whose intersection point is the center of rotation. D. Any rotation can be expressed as a composition of reflections across two parallel lines that are equidistant from the center of rotation.

1. **Problem Statement:** Determine which statement about rotations and their expression as compositions of reflections is true. 2. **Key Concept:** A rotation in a plane can be represented as the composition of two reflections. 3. **Important Rule:** The composition of two reflections across lines that intersect at a point results in a rotation about that point by twice the angle between the lines. 4. **Explanation:** - If the two lines intersect at the center of rotation, the rotation angle is twice the angle between these lines. - The lines do not need to be perpendicular; any two lines intersecting at the center can generate a rotation. - Reflections across parallel lines produce translations, not rotations. 5. **Evaluate each option:** - A: Composition of reflections across three lines is unnecessary; two suffice. - B: Two perpendicular lines produce a rotation of 180 degrees, but rotations of other angles require lines at other angles. - C: Two lines intersecting at the center can produce any rotation angle by adjusting the angle between them. - D: Parallel lines produce translations, not rotations. 6. **Conclusion:** The correct statement is: $$\text{C. Any rotation can be expressed as a composition of reflections across two lines whose intersection point is the center of rotation.}$$