The most probable and most likely answer to this problem would be C. revealed much about their behavior.
Out of the four options presented in this problem, C. would only need a complete subject to make it a correct sentence. Options A. by closely watching and gathering data and B. to terrifying effect would probably need other more words and/or phrases to make them more complete. D. insect studies, on the other hand, can also be considered as a correct option IF insect become the subject.
We may take the winds helping out Gilgamesh's as his "teammates". However, these winds did not come naturally but were thrown in at Humbaba, which sounds like some sort of supernatural control of weather of which Gilgamesh takes advantage to defeat his foe. We can state that Gilgamesh relies on supernatural forces because he leaped upon Humbaba as he saw him pinned down to ground by the action of winds.
Grammar errors DO create confusion and will detract from the message the author is trying to provide (unless the errors are intentional and are meant to contribute to the meaning of the written work in very rare cases).
Hope this helps! :)
Not sure I can come up with ten questions (don't have answers) but I can get you started.
1) How did you pick the title of your book, Artemis Fowl?
2) Who is your favorite character?
3) Did you write this book with the intention of having other books follow?
