What did the man try to convince he was NOT? in the tell tale heart

What is the main purpose of a speech bubble in a graphic novel ?

Third-person omniscient narrators are likely to be reliable because they're impersonal and know everything about the story they don't care enough about the characters to lie none of the above both "a" and "b"

Why do you think frank tashlin titled this story  the bear that wasn’t? why didn’t the factory officials recognize the bear for what he was? why did it become harder and harder for the bear to maintain his identity as he moved through the bureaucracy of the factory?