It has been a while since I have needed to do a cert for them, but it seems to me they tell you which answer you got wrong so it is "guess again" time.
It is not unheard of for the software on quizzes from anybody to have wrong answers being the "correct" one. More frequently, however, in our haste we quickly read "Which of the following should you not do when you arrive?" Of course the first and second activities you ARE to do are answer options, but the question requires closer reading to see what you are NOT to do. If I had a buck for each time I've fallen in that trap the eventual payment for the shop might be worthwhile
And if you are talking about the big chain in FL, GA and some locations in other southern states, there are a whole heck of a lot of people qualified. The chain has about 1020 locations in the SE and when a round of shops is posted, probably 90-95% of them are taken within the first 20 minutes. Considering the time frames during which the shops can be performed, shoppers can generally manage 4-5 in one time frame round, 9-12 in another time frame round and 12-15 in the third time frame round. Only one time frame posts at a time so obviously there are a ton of shoppers out there.