When the author first heard the "rapping at his chamber door," in The Raven , who did he think was outside?

When the author first heard the "rapping at his chamber door," in The

1.	When the author first heard the "rapping at his chamber door," in The Raven , who did he think was outside?
A.	his neighbour
B.	the raven
C.	pluto
D.	some late night visitor
Answer» E.