The author’s primary purpose to educate children is shown in the last options as you fully underestand the tale.
"That is the very reason why we are so cautious; for if you yesterday treated us better than the Goats you have had so long, it is plain also that if others came after us, you would in the same manner prefer them to ourselves.”
It's simmilar to a fable in which you get a moral answer, a teaching of some sort. In this case, it would roughly be: "Treat everyone the same way" or the other way around: "Don't trust those who treat you better by treating anyone else wrong".
I'd choose option E because it's the moment when you start entering a cathartical moment, very useful when teaching things to children.
The Ghost of Christmas Past is the first spirit to visit Scrooge after the ghost of Marley. It arrives as the clock chimes one. It is an ephemeral spirit that appears to be both old and young at the same time with light streaming from the top of its head. ... Scrooge turns on the ghost and demands to be shown no more.
