Answer:
3 - thrown carefully or just thrown ( don't know if it is one word or two )
5 - is sneaky or sneakily
very sorry if the answer is wrong!
C CCzcCCzcccccccccccccc c c c c
The answer is (C), becuse the reader does not now was is threatening the characters lives. In the other answers it told "it" was thereatening their lifes. This is why (c) has the sentence fragment.