A contract to loan money includes the term that the interest rate will be calculated based on the current U$.$S$.$ Treasury rate at any given time. In

this case,

a$.$ the contract may incorporate the evidence under the Statute of Frauds

b$.$ the contract may not incorporate the evidence under the Statute of Frauds.

c$.$ the contract may incorporate the outside evidence under the parol evidence rule

d$.$ the contract may not incorporate the evidence under the parol evidence rule