In Terms of a Salesperson's Relationship with Other Salespeople in the Company

In terms of a salesperson's relationship with other salespeople in the company, which of the following actions is unethical?

A) A salesperson falsely tells her boss she knows that Hugh, a member of the sales team, always pads his expense account.
B) Oscar reaches Perry on vacation in the mountains to tell Perry about a potential problem with Perry's biggest customer.
C) Arnet gives Keith the message that she took for him from a potential client.
D) Allison answers a service question for another salesperson's customer.
E) All of the above actions are unethical.