The main idea of this excerpt is the fact that the Grimm Brothers had a strong belief (that the most natural and pure forms of culture were linguistic and based in history) and in following it, they <em>saved</em> the fairy tale. In order to do so, the author gives a supporting detail and reveals the main idea, followed by more details.
Hyperbole
"I have all the money in the world" is an obvious Hyperbole, or otherwise known as an exaggeration. No one has "all" the money in the world, however many of us wish that was the case.
<em>Hope this helps!</em>
I don’t think that any of the options are correct..?
I think that the answer should be d. Believe it or not Joe, it is time for us to leave.