The answer is c. The number of different times zones in the United States
As for this question, when you want to thank someone for the help, it all depends on how that someone has helped you and if the manner that you were helped would also come in as a factor.
When there is immediate contact between the helper and the one being helped, the most direct way to thank someone is to vocalize it and say it to that person that gratitude that you wanted to express. Other ways would be to return the favor to that person. Most people prefer them to be of equal or more than the value of the help given at the moment. If there is no such available way, then what others tend to do is to remain in debt for that person. So when the time comes that the person needs help, they can readily assist and offer the help they needed.
I think Grendel get stuck in a tree because of his careless curiosity of the world above him, that of the humans. He know nothing about that world because he was used to his own world in the underground however he still get tempted to explore. He was also attacked by a bull there because he looks different from the rest of the creatures above.
Answer:
a. to teach how to cook different foods