If I have to facepalmed myself reading your ignorance, I might have to take myself to the ER. Allow me to help you to break down the situation here slowly: the question being asked here is not if anyone made mistake by participating in the quiz, it's if you're [and other accounts] an alt of deadsea33. Many members are also participants of that thread, but a lot of them [currently] are not as suspicios as you in term of accuracy, timing in giving your answers, and other factors.

As for the matter being investigated here, it is not only deadsea33's merit history, but also the possible alt-account of his, and this is where you come to the spotlight.

In short, if you really find it hard to understand, there is an ongoing investigation that deadsea33's account changed hand, and that he published his quiz thread of which you participated for the sole purpose of abusing merit by rewarding it to his other accounts, of which, so many signs point out to your account as one of it.