Which statement is true about figures ABCD and A′B′C′D′?

a.They are congruent, because A′B′C′D′ is obtained by translating ABCD up by 4 units and then reflecting it about the y-axis.

b.They are congruent, because A′B′C′D′ is obtained by translating ABCD 4 units right and then reflecting it about the x-axis.

c.They are similar, because A′B′C′D′ is obtained by rotating ABCD counterclockwise by 180 degrees about the origin and then translating it 2 units left.

d.They are similar, because A′B′C′D′ is obtained by rotating ABCD counterclockwise by 180 degrees about the origin and then translated 2 units right.