What is the legal effect of an obligor not being given notice of an assignment of rights under a contract?
A) There is no effect, because there is not duty to notify the obligor.
B) The obligor must perform the same duty for both the assignor and the assignee.
C) Performance by the obligor to the assignor will discharge the duty as to the assignee.
D) The obligor is discharged from having to perform the duty to either the assignor or the assignee.
E) The obligor may sue the assignor for damages.