Answer:
d. John Green
Step-by-step explanation:
Agatha Christie, Jane Austen, and Daisy May are all authors, but they did not write The Fault in Our Stars.
So, the answer is

John Green is an American author of young adult fiction. He is best known for his novels Looking for Alaska, An Abundance of Katherines, Paper Towns, Will Grayson, Will Grayson (with David Levithan), and The Fault in Our Stars.
The Fault in Our Stars is a 2012 novel about two teenagers with cancer who fall in love. It was a critical and commercial success, and was adapted into a film in 2014.