Which evidence form the text shows how Gregor feels about the change in his father

A) he became noticeably short of breath.

B) still, still, was that really his father?

C) his father thought it necessary to always be extremely strict with him.

D) he was standing up straight enough now

The answer is: B. still, still, was that really his father?

Explanation:

As you can see, this is the only option which offers "a way of change" in this case, the fact of asking yourself if "that is your father" means that you cannot believe how much has he changed. The other options aren't possible, as they dont' give any prompt as for whay Gregor might feel about the change in his father.

I think its B) still, still, was that really his father?

I hope I'm right check and see if I'm wrong I'm so sorry