I think i found the paragraph:
There are a few exceptions. In the Clarendon Laboratory at Oxford University sits a battery-powered bell that has been ringing since the year 1840. The bell “rings” so quietly it’s almost inaudible, using only a tiny amount of charge with every motion of the clapper. Nobody knows exactly what kind of batteries it uses because nobody wants to take it apart to figure it out.
Answer choices for the above question
A. The battery-powered bell at Oxford will last forever.
B. Researchers don’t want to risk breaking the battery-powered bell.
C. The author believes there is a light inside the bell.
D. The reverberations of the bell might give off a light charge in extreme darkness.
Answer:
B - Researchers don’t want to risk breaking the battery-powered bell.