Fill in the blank choosing the appropriate option:He is so ___________ that he immediately believed my story of ghosts.
The writer was overconfident about his ability to write ghost stories because ……
(a) whenever magazines wanted a ghost story, they got in touch with him
(b) he was always able to write a ghost story whenever he had to write one
(c) the readers appreciated his ghost stories
(d) he knew the ghost lady would help him write a good ghost story