What series of transformations from Triangle ABC to Triangle DEF shows that Triangle ABC is congruent to Triangle DEF?

A. A reflection across the y-axis and then a translation of 1 unit right, 2 units up

B. A clockwise rotation of 90 degrees followed by a translation to the right 4 and up 4

C. A reflection across x-axis followed by a translation of 1 right and 1 down

D. A reflection across the line y=x followed by a rotation of 270 degrees