Margo and Bruce have an agreement in which Margo will paint the entire first floor of Bruce's house for $5,000. As it turns out, Bruce cannot afford to have the whole first floor painted. Margo and Bruce decide that instead of the entire first floor, Margo will paint the living room and dining room only for $2,500. They put the original contract into a paper shredder and enter into another contract indicating the new terms. This is an example of a(n) concurrent breach O remediation O novation accord and satisfaction substitute contract