Answer: A) To show that Granny has moved on with life after being jilted.
Step-by-step explanation: In the given excerpt from "The Jilting of Granny Weatherall" by Katherine Anne Porter, we can see the granny explaining how it is important to not let the fruit be wasted, or rot, because there is always someone who can use it. She emphasizes in the fact that there is no need to let things get lost and compare the fruit with other things in life. We can see that Granny has moved on with life after being jilted, because she is explaining those things to someone else.