The answer has the following text in it.

7 rows where column d = three

The wording of the answers were confusing as hell.

They should be listed as

7 rows returned, the last row has column d = three

or something like that.

I got it right, but I spent more time analyzing the answers trying to figure out what they meant than I did actually analyzing the question. I kept looking at the code, and saying to myself, "None of the rows repeat enough time to get the word three seven times, etc etc...

I ruled out the insert error because the error that comes back is about inserting into column a, not b.