An Important Difference Between Duress and Undue Influence Is That

An important difference between duress and undue influence is that:

A) duress occurs in a relationship of trust,while undue influence employs improper threat.
B) duress involves physical compulsion,while undue influence involves economic compulsion.
C) the scope of duress has contracted since the 19^th century,while the scope of undue influence has expanded since the 19^th century.
D) duress is wrongful coercion,while undue influence is unfair persuasion.