Read this excerpt from a student’s analytical essay. Tweedledee and Tweedledum are two crazy characters that Alice runs into as she goes through the Looking-Glass land.

Which is the best revision of this informal sentence?

I think Tweedledee and Tweedledum are two very unusual characters whom you would never, ever meet in the real world.
Tweedledee and Tweedledum are two characters who come to life after Alice recites a well-known nursery rhyme about them.
Tweedledee and Tweedledum are just crazy with the way they act and the nonsensical things they say to each other and to Alice.
Two of the more memorable characters whom Alice encounters during her journey through the Looking-Glass land are Tweedledee and Tweedledum.