Once upon a time in a piano exam I threw my right foot onto the sustain pedal, and it was so highly polished that I literally slid off the seat and halfway under the piano. Option a) was probably to blame too. Option d is safest.
Ugh! How was that notated in the score? Ha!
Dare I ask how your exam went?
Well, I never failed one, so it must have been at least OK. I can't remember which one it was.