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

Bence 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 deter-mined from the face of the instrument.