How Can a Salesperson Protect Him or Herself from Being

How can a salesperson protect him or herself from being sexually harassed by a customer?

A) Make sure that she does not become too dependent on one single customer.
B) Plan to interpret any overt action that looks like friendship as harassment.
C) Be standoffish and do not create long-term relationships with customers.
D) Treat every sale as if it were a market exchange transaction.
E) There is nothing a salesperson can do to prevent sexual harassment.