exercise - fix selection of answer when target is incorrect

When a person clicks in the wrong place on selecting an answer, the update hangs and the question result is never sent.
Got no problem with logging, just prefer it to be in its' own PR so we can discuss it on its own and not hold this one up. Do we want to use morgan or another logging framework? It's a good question, anything is better than nothing, but in the future put that into a diff PR.