Congruence & transformations

Jerome was curious if

△ A B C

was congruent to

△ F E D

, so he tried to map one triangle onto the other using transformations:

Jerome concluded:

"It's not possible to map

△ A B C

onto

△ F E D

using a sequence of rigid transformations, so the triangles are not congruent."

What error did Jerome make in his conclusion?

(Choice A)
One more transformation — a rotation — would map $△ A B C$ ‍ onto $△ F E D$ ‍. So the triangles are congruent.
(Choice B)
One more transformation — a reflection — would map $△ A B C$ ‍ onto $△ F E D$ ‍. So the triangles are congruent.
(Choice C)
There is no error. This is a correct conclusion.

Geometry (FL B.E.S.T.)