[Dog Training] Nia and Bruno Enter into a Written Contract

Multiple Choice

[Dog Training] Nia and Bruno enter into a written contract for Bruno to train Nia's dog.Under the contract,Nia is required to pay Bruno $20 for each training session.
-Would their contract be governed by common law or the UCC?

A) Common law.
B) Both common law and the UCC.
C) Common law,because the UCC specifically excludes biological substances.
D) The UCC.
E) Neither common law not the UCC.