Today's multiple-choice question

My mortifying lack of progress on my current project is:

1. A sign that the project is just not working and I should move on to something else.
2. One of those inevitable oscillations in enthusiasm and effectiveness that all writers face and which I should ride out with faith and optimism.
3. Something to be seen as a motivating challenge.
4. Me being bone-lazy.

Unfortunately, I have a very strong suspicion about what the correct answer is.