A. The phrase "tattered and fragile" modifies the word <em>book</em>.

If two similar waves are traveling in the same medium, then they have same wave velocity. so we can infer that

Now, as per the formula ~ we know that :

Now, we can write it as :

And it's also given that frequency of wave A is 3 times that of frequency of wave B.
So, let's add the relation to our equation ~



So, choice C is correct ~
In Beowulf, he is a flat character, but in Grendel, he is a round character.
In Beowulf, Grendel is nothing but a mere monster, brainless, with no actual motivation other than to cause pain to people. We don't know much about him apart from the fact that he likes to kill.
On the other hand, Grendel in Grendel is different - he has human qualities, we can clearly see what his motivation is, and he almost seems more human than actual humans.
Point of view? Or do you mean in an essay? If you're referring to an essay it would be an Autobiography