Choose the correct question tag to fill in the blank.
I am the happiest man in my town, ________?

The correct answer is Option B (aren't I?).

Key Points:
• This question tests a special rule for forming question tags with the first-person singular pronoun 'I am'.
• Grammar Rule:
• For an affirmative statement starting with 'I am', the standard negative question tag is 'aren't I?' (not 'amn't I?', which is grammatically incorrect and non-standard).
• Constructing the tag:
• Statement: I am the happiest man in my town (Affirmative).
• Negative tag for 'I am' = aren't I?
• Key Takeaway: The correct negative question tag for an affirmative sentence starting with 'I am' is always 'aren't I?'.