Otella Borrowed $5,000 from a Bank and Was Behind in Her

Multiple Choice

Otella borrowed $5,000 from a bank and was behind in her payments. Later, Armand wrote to the bank that Armand would "make good" Otella's obligations if Otella did not pay. Armand's agreement is:

A) binding because it is written.
B) binding because it is supported by consideration.
C) invalid unless Otella also signs Otella's statement.
D) not binding because it is not supported by consideration.