Ben Signs a Promissory Note for $1,500 in Favor of Community

Ben signs a promissory note for $1,500 in favor of Community College. The note is undated but specifies that it is "payable one month after date." This note is

A) negotiable.
B) nonnegotiable, because one month is not a reasonable time.
C) nonnegotiable, because there is no option to pay early.
D) nonnegotiable, because the maturity date cannot be determined from the face of the instrument.