Which series of transformations shows that triangle a is congruent to triangle b?

a.
reflect triangle a over the x-axis, translate it 4 units to the right, and reflect it over the y-axis.

b.
reflect triangle a over the y-axis, translate it 5 units to the right, and rotate it 90° counterclockwise about the origin.

c.
reflect triangle a over the y-axis, rotate it 90° counterclockwise about the origin, and translate it 5 units to the right.

d.
reflect triangle a over the y-axis and translate it 2 units up.