I did something very similar in my exam - for my historical periods question I misread it - the easier option was worded in a totally foreign way that I had never encountered before, therefore I wasnt prepared to write an entire essay on a topic that I could have misinterpreted and ended up being wrong. So I chose the other option which was more explicit, but I had absolutely no idea about it - I'm not joking, it was the NK Egypt, and this option asked to evaluate specific pharaohs within the period, ones that I never studied. As it turned out, I managed a 21 just with my bullshitting and inventory skills alone- so don't despair jack white. And definetely let us know how you go!