badly formed answers
you are selecting 4 columns in your question (ID, Y, Test1, Test2) yet your answers and the supposed "correct" one only has 3
Say, not optimal, but if you read the complete task 'The values are listed as ID, TEST1, TEST2. For example: 1, 3, 0', then it should be clear.:-P
I searched the trick behind the question, but found nothing, so all 4 selected, and won a point. Thx!