Which of the Following Can Be Negotiable

Multiple Choice

Which of the following can be negotiable?

A) A promissory note that states, "Pay to Luis Calvillo $500 on September 30, 2013. "
B) A check written on the standard check form that does not state the date it was issued.
C) A promissory note from Howard to Hainey Feed & Seeds, Inc. promising to pay for the seed purchased in the spring with bushels of grain harvested in the fall.
D) An oral promise to pay to the order of Manny $800 on demand.