The answer should be decadence
The correct answer is D. This sentence is a perfect example of parallel structure because either after and before AND it in both cases uses simple past tense verbs which are LEARNED AND TRAVELED. The other sentences never show parallelism due to their units are never the same. For example, in letter A , it uses a verb in simple present WALKS AND a progressive tense verb which is TAKING. So, to sum up, for a sentence to be considered parallel, it must be coherent in its structure and internal words. They need to have harmony and unity in tenses as well.
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.
