Duress Is Distinguishable from Undue Influence in That

Duress is distinguishable from undue influence in that

A) duress refers to the use of some kind of pressure,whereas undue influence does not.
B) duress is never defined in terms of the parties' relationship,whereas undue influence sometimes depends on the parties' relationship.
C) duress is never defined in terms of the parties' relationship,whereas undue influence always is.
D) duress refers to the use of some kind of pressure,whereas undue influence involves improvident bargains.