Under the Commercial Paper Article of the UCC, which of the following circumstances would prevent a promissory note from being negotiable?
1. An extension clause that allows the maker to elect to extend the time for payment to a date specified in the note.
2. An acceleration clause that allows the holder to move up the maturity date of the note in the event of default.
3. A person having a power of attorney signs the note on behalf of the maker.
4. A clause that allows the maker to satisfy the note by the performance of services or the payment of money.