Achilles this is because of the story of Achilles heel which was the weak spot of a demi god that was untouchable in every spot other than the heel.
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.
Answer:1) He makes the dinner. 2) Charlie writes the letter. 3) The teacher reads my story. 4) We send the wedding invitations. 5) Sally cleanes the car.
Ben is the simple subject?