The right answer for the question that is being asked and shown above is that: "(D) The light would have been weakened" if Merriman had touched The Clock pendulum while retrieving the book of Gramarye then <span>(D) The light would have been weakened</span>
If I need to remember something, I usually try to associate it with something else I know so when I try to find the answer to that kind of question, I immediately think of it.
