Which of the following sentences demonstrates proper capitalization?
AThe dog, pluto, is Mickey mouse's best friend.
BThe Dog, Pluto, is Mickey Mouses's best friend.
CThe dog, pluto, is mickey mouse's best friend.
DThe dog, Pluto, is Mickey Mouse's best friend.
AThe dog, pluto, is Mickey mouse's best friend.
BThe Dog, Pluto, is Mickey Mouses's best friend.
CThe dog, pluto, is mickey mouse's best friend.
DThe dog, Pluto, is Mickey Mouse's best friend.