Identify the grammatically correct sentence: The number of books in the library, despite being carefully organized, have increased considerably over the years, The number of books in the library, despite being carefully organized, is increased considerably over the years, The number of books in the library, despite being carefully organized, was increased considerably over the years, The number of books in the library, despite being carefully organized, has increased considerably over the years

Answer: The number of books in the library, despite being carefully organized, has increased considerably over the years
Explanation

The number of books in the library, despite being carefully organized, has increased considerably over the years.

"The number" is singular, so it takes "has increased."

The present perfect tense correctly shows an increase over time.

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