Rico Signs a Lease on Behalf of Start-Up Games, Inc

Rico signs a lease on behalf of Start-Up Games, Inc., with Tower Office Suites. As part of the lease, Rico signs a document titled "GUARANTY," which states that it is "an absolute guaranty" of the lease's performance.
-Refer to Fact Pattern 25-2.The reason for the result in the previous question is that

A) Rico signed a "GUARANTY."
B) Tower Office Suites owns the property and can re-rent the premises.
C) the other tenants can equitably absorb a slight increase in rent.
D) Start-Up will likely move out when it stops paying the rent.