According to Peter Drucker, the most important skill for setting priorities is learning to say "no."

Which of the following is an example of an internal proposal?

A) An employee's email persuading his superiors to choose his team over an external agency for a particular project
B) A vendor's email proposing to handle the internal communication structure of a company's new branch
C) An email from the head of one company to another proposing to share resources on similar projects
D) An email from a department manager to an auditing firm scheduling an internal audit for her department
E) An email from the founder of an organization to the general public denying a charge of defrauding investors