In Lewis Carroll’s Alice’s Adventures in Wonderland, Alice expects others to be well-mannered. From which sentence can this personality trait be inferred?

Alice caught the baby with some difficulty, as it was a -shaped little creature, and held out its arms and legs in all directions, “just like a star-fish,” thought Alice. The poor little thing was snorting like a steam-engine when she caught it, and kept doubling itself up and straightening itself out again, so that altogether, for the first minute or two, it was as much as she could do to hold it.
As soon as she had made out the proper way of nursing it, (which was to twist it up into a sort of knot, and then keep tight hold of its right ear and left foot, so as to prevent its undoing itself,) she carried it out into the open air. “If I don't take this child away with me,” thought Alice, “they're sure to kill it in a day or two: wouldn't it be murder to leave it behind?” She said the last words out loud, and the little thing grunted in reply (it had left off sneezing by this time).”Don't grunt,” said Alice; “that's not at all a proper way of expressing yourself.”
The baby grunted again, and Alice looked very anxiously into its face to see what was the matter with it. There could be no doubt that it had a very turn-up nose, much more like a snout than a real nose; also its eyes were getting extremely small for a baby: altogether Alice did not like the look of the thing at all. “But perhaps it was only sobbing,” she thought, and looked into its eyes again, to see if there were any tears.