From what I am seeing from this, it's a road that presents many challenges.
(just my point of view)
1, 2 and 4 don't really seem surreal, those are the options that could happen anytime in your life. However, is it possible for a human being to transform into an insect? Since it is not, the correct answer to your question, what can be considered surreal in the Metamorphosis is 'Gregor transforming into an insect'.
Answer:
I think that the first blank is a subject, but I'm not sure on the other ones
I think the second option is your answer you are looking for.
