The answer is B: Sadness mixed with a sense of relief.
In this story by the great writer, Franz Kafka, Gregor Samsa is turned into a horrible bug. This brings a lot of hardships, both for Gregor and his family.
After Gregor dies, his family, although saddened by Gregor´s death, feels a great deal of relief, and after considering their finances, they realize that they can finally move to a different apartment, something that they couldn´t do while Gregor was alive.