Question

Fill in the blanks with the correct option:
Robert is _____one who has written _____ book about worsening environmental conditions.

• A. a, the
• B. the, a
• C. an, a
• D. the, an

Answer 1

The Correct Option is B

Explanation of Articles 

• "A" is used because "book" refers to any book, not a specific one.
• "The" is used before "one" to specify the particular person being talked about.