Answer: Number 4.
Explanation: It's short and it is stating what your story is going to be about. I hope this helps and have a great day!
I would have actually written it this way
"Hellen arrived unannounced when the house was a mess, and we weren't ready for visitors."
But, I guess, the closest answer to this one would be the last option. :)
Hope this helps.
Linking verbs don't show actions but action does hence the name action verb
