On behalf of Bubble Tea Company, Corey signs an instrument in which she promises to deliver 100 cases of tea as payment to Deli Inc. on April 1. This instrument is

a. negotiable.

b. nonnegotiable, because it does not indicate a specific brand of tea.

c. nonnegotiable, because tea is not a medium of exchange authorized or adopted by a government as currency.

d. nonnegotiable, because it does not recite any consideration