Fact Pattern 24-1

Fact Pattern 24-1
Petro Oil Refinery asks Quality Bank for a loan to increase its oil inventory. Quality requires Robin, Petro's president, sign a personal guaranty to pay the debt if Petro defaults. Meanwhile, to sell fifty barrels of refined oil to Slick Lubricants, Inc., Petro asks its outside accountant Tina to co-sign a credit application.
-Refer to Fact Pattern 24-1. If Robin is a guarantor, then the guaranty is re?quired to be in writing because of

A) the debtor's right of redemption.
B) the co-signer's right of contribution.
C) the creditor's transfer of possession.
D) the Statute of Frauds.