Dan Applies to Borrow $1,000 at 6 Percent Interest from Eagle

Dan applies to borrow $1,000 at 6 percent interest from Eagle Loan Company and signs a note for the amount. Without Dan's authorization, Eagle changes the rate on the note to 9 percent and attaches a copy of his application to the note. Material alteration of the note occurred

A) only when Eagle attached a copy of Dan's application to the note.
B) only when Eagle changed the interest rate on the note.
C) under none of these circumstances.
D) when Eagle changed the rate and attached the application.