I failed a review audit. And I don't understand why. It's not link-only, because the answer would stand on it's own without the link. It's not spam, the link is actually on topic. As the whole answer, it's not exactly great, but it's reasonably on topic. 

It was deleted as spam or offensive and I can see nothing offensive about it either. 

So what did I miss? 

[![enter image description here](https://i.stack.imgur.com/S9T7n.png)](https://i.stack.imgur.com/S9T7n.png)

<https://stackoverflow.com/review/low-quality-posts/14283364>