On May 1st Alex issues a $3,000 promissory note payable to Sandy in exchange for goods sold by Sandy to Alex. The note payable on August 15th, "on the condition that Sandy delivers conforming goods by July 31st." Under UCC Article 3, the promise made by Alex could best be described as:
A. Impliedly conditional
B. Expressly conditional
C. Constructively conditioned
D. Contractually Conditioned
E. A or C above