Which of the following relationships is unlikely to provide a basis for an undue influence case?

A) Parent and child
B) Husband and wife
C) Lawyer and client
D) Salesperson and customer

Undue influence cases involve people who,though they have capacity to enter a contract,are in a position of particular vulnerability in relationship to the other party to the contract.This relationship can be one of trust and confidence,in which the person being influenced justifiably believes that the other party is looking out for his interests or at least that he would not do anything contrary to his welfare.Examples of such relationships would include parent and child,husband and wife,or lawyer and client.The relationship also can be one in which one of the parties holds dominant psychological power that is not derived from a confidential relationship.