This is essentially language change at work. Do you know how Shakespeare sometimes sounds "weird" to us? that's because English has changed since then.
Language change is not abrupt, but gradual, and while the change takes place sometimes two forms are used: so while it is likely that in years to come only dreamed will be correct, and in the past only "dreamt", currently the change is not complete and both are correct.
Answer:
The moral lesson of this myth is that unchecked curiosity and disobedience can be dangerous, but hope remains.
Explanation:
The answer is A, because the protagonist is the main character, and that's what Rider is. The other answers don't really make sense in terms of the role he plays in the story.
Hope I helped!
