Read the following context and choose the best option to answer the question.
Context: Hermione opened her door with a curious look . " Harry , what are you doing here ? " " I came to give you the rest of your birthday gift . " She smiled . " The rest of it ?
Question: Why did Harry put so much thought into the gift for Hermione .
Options: 
A. Harry seems to believe that Hermione is a good colleague .
B. Harry seems to think that he 'll get something in return .
C. Harry seems to think Hermione deserves to be rewarded .
D. Harry seems to believe that Hermione is a close friend .


D