Which of the Following Best Describes Alteration

Multiple Choice

Which of the following best describes alteration?

A) It is an authorized change in an instrument that does not necessarily modify the obligation of a party.
B) It is an authorized change in an instrument that is done during the process of theft.
C) It is an unauthorized change in an instrument that purports to modify in any respect the obligation of a party.
D) It is an authorized change in an instrument that is done under duress.