The three words in the given passage that are required to be capitalized would be:
- English
- Princeton Review
- As per the grammatical rules, capitalization is employed for proper nouns(be it place, thing, or person), abbreviations, at the start of a sentence, etc.
- This helps promote a better comprehension of the provided idea among the readers.
- In the given passage, the words English and Princeton Review must be capitalized as they denote proper nouns while the other options are not included as they demonstrate common nouns.
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