__________ are a special form of contract that satisfy the requirements established by Revised Article 3 of the UCC.

A. Banknotes
B. Negotiable instruments
C. Letters of credit
D. Stocks

An: B

To determine the correct answer, we need to understand the requirements established by Revised Article 3 of the UCC (Uniform Commercial Code) and see which option meets those requirements.

Revised Article 3 of the UCC primarily deals with negotiable instruments. Negotiable instruments are a special form of contract that meet specific criteria outlined by the UCC. To be considered a negotiable instrument, the following requirements must be satisfied:

1. It must be in writing.
2. It must be signed by the maker or drawer.
3. It must contain an unconditional promise or order to pay a fixed amount of money.
4. It must be payable on demand or at a definite time.
5. It must be payable to order or to bearer.

Looking at the options provided:
A. Banknotes: Banknotes are issued by a central bank and usually serve as a country's official currency. They may not meet all the requirements of a negotiable instrument, such as being payable to order or bearer. Therefore, option A is not the correct answer.
B. Negotiable instruments: This option directly mentions negotiable instruments, which is the topic of Revised Article 3 of the UCC. It satisfies the requirements and is the correct answer.
C. Letters of credit: Letters of credit are financial instruments used in international trade, but they do not meet all the requirements of negotiable instruments. Therefore, option C is not the correct answer.
D. Stocks: Stocks represent ownership in a company and are not considered negotiable instruments as defined by the requirements of Revised Article 3 of the UCC. Therefore, option D is not the correct answer.

In conclusion, option B - Negotiable instruments - is the correct answer as it satisfies the requirements established by Revised Article 3 of the UCC.