The rule (x, y)→(−x, y) maps △ABCto △A′B′C′. Which statement correctly describes the relationship between △ABCand △A′B′C′?

The triangles are congruent because △A′B′C′ is a rotation of △ABC, and a rotation is a rigid motion.

The triangles are not congruent because △A′B′C′ is a reflection of △ABC, and a reflection is not a rigid motion.

The triangles are congruent because △A′B′C′ is a reflection of △ABC , and a reflection is a rigid motion.

The triangles are not congruent because △A′B′C′ is a translation of △ABC, and a translation is not a rigid motion.