Hey, a similar thing happened to me and it makes me feel better that I wasn't the only one. For Mod C I answered the conflicting perspectives question instead of the history and memory one, using the prescribed text for history and memory.
The questions were very similar just with a few key words differences. However, luckily I noticed after I wrote the response and notified the supervisor. She just told me to write what happened on the front, so I did
She said that they take things like that into consideration.
Does anyone know if we will be penalised though? And would they mark it using my text in respect to the question I answered?
So don't worry, I think this kind of thing happens often and they know how to deal with it.