△def is mapped to △d′e′f′ using the rule (x, y)→(x, y+1) followed by (x, y)→(x,−y).

which statement correctly describes the relationship between △def and △d′e′f′ ?

△def is not congruent to △d′e′f′ because the rules do not represent a sequence of rigid motions.

△def is congruent to △d′e′f′ because the rules represent a translation followed by a rotation, which is a sequence of rigid motions.

△def is congruent to △d′e′f′ because the rules represent a translation followed by a reflection, which is a sequence of rigid motions.

△def is congruent to △d′e′f′ because the rules represent a reflection followed by a reflection, which is a sequence of rigid motions.