multiple choice question not grading correctly

I need your help.  I have three quiz questions which use images as options. The first and third score correctly, the middle one does not. 

The page in question is 1.8 (CoL1-2). In the story file I have the top image selected as the correct answer, but when published and in preview it scores as incorrect and the correct answer displays as the second image.

I checked everything I can think of, triggers, states, feedback layers, but can not find anything that is different with this page than the other two which would cause this error.

I have attached the story file for review.

Thanks.

1 Reply