A parallel sentence mentions the same grammatical expression twice. I would go with "D". 'Passed' and 'Demonstrated' are both past tense words that express the same past tense grammatical idea.
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Answer:
a farmer because he produces good while food is a basic need
The sentence which most improve the sentence by adding description is this: 'there are plenty of vegetables, flowers, and plants at the community garden where I work. This sentence is descriptive in nature and tell us some of the charactersitics of the place where the speaker works.
It might be said that the correct sentences is C <span> "She is the person whom he had found sleeping in the library". This is because whom is correctly used.
In the case of A</span><span> and B, They are incorrect because instead of who it should have been whom, the correct pronoun.
On the contrary; sentence D should be who instead of whom. </span>
