I guess there are methods to insure that no one scores perfect on an exam.
Hypothetically,
If say, you were an old time white hat, who, hasn't opened up the rules book since 2012,
it would be likely that, as such, you would have missed the 2013 change that deleted loss of down for OPI.
If this were the case, the hypothetical old time white hat would be inclined to select answer number 3 on the jackhammer test!
Why? Because the down would not be replayed, since by (2012) rule;
Penalty Acceptance includes a loss of down! It would be 4th down.