Expiration can become stock

At expiration, a short call is $0.02 in the money and nobody gives any instructions. What usually happens?

• It expires, because two cents is too small to matter
• It is exercised automatically, so the writer is assigned
• The broker closes it at the next open

Which product turns an in-the-money short leg into a cash payment instead of shares?

• A single-stock option
• An ETF option
• A cash-settled index option