Fact Pattern 33-2 (Questions 18-19 Apply)

Fact Pattern 33-2 (Questions 18-19 apply)
Amy signs a lease on behalf of Business Start-up,Inc.(BSI) ,with Cool Properties,Inc.As part of the lease,Amy signs a document titled "GUARANTY," which states that it is "an absolute guaranty" of the lease's performance.
-Refer to Fact Pattern 33-2.Amy will be held liable for unpaid rent because:

A) Amy signed the lease "on BSI's behalf."
B) Amy signed a "GUARANTY."
C) Cool leases the property to different tenants at different times.
D) Cool wrongly insisted that Amy sign an alleged "GUARANTY."