Fill in the blank (_) in the following sentence from the following choices.
Sentence: The floor could not withstand the cat's scratches, but the wall was unscathed, since the _ was impervious to them.

Choice 1: The floor could not withstand the cat's scratches, but the wall was unscathed, since the floor was impervious to them.
Choice 2: The floor could not withstand the cat's scratches, but the wall was unscathed, since the wall was impervious to them.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2. The sentence should read "The wall was unscathed, since the wall was impervious to them." The floor is not imper