Answer: Even with the warm weather, there was still a vestige of snow on the ground. Vestige is a trace of something that is disappearing or no longer exists.
Explanation:
I hope I'm right/this helps
The answer to your problematic question would indeed be the letter C.
Grandmother does not accept her son's guilt tactics. She knows when things are wrong and she voices her extreme disgust about the Nazi party to Bruno's father.