My stupid test

Please circle the incorrect answer.

1. Which of the following is NOT part of the Dunlop's model?
A. part of the model
B. not part of the model
C. part of the model
D. part of the model

they were looking for the answer that is not part of the model. so the correct answer would have been B.

if i was supposed to circle the incorrect answers, i would have circled all A, C and D since they are part of the model.

however, they said to circle the incorrect answer (singular, not plural here), so there can only be one answer.

i circled B anyways.

I THINK THEY'RE TRYING TO PLAY MIND GAMES WITH US.