The correct option is B.
Step-by-step explanation:
"He is the author of The Tiger in the Garden, which won the Booker Prize and many other awards" is the correct option.
The other options are incorrect because:
- Titles have to be capitalized in their first letter and content words.
- The name of a prize is also capitalized.
- The word "author" is not a proper name so it should not be capitalized.