In 1995,Mark Graf,a Security Specialist at the Rocky Flats Nuclear

In 1995,Mark Graf,a security specialist at the Rocky Flats nuclear facility,became alarmed about the temporary removal of 450 kg of plutonium oxide from a vault-like room to a "soft room" protected by drywall anyone could punch a hole through.Graf eventually had to take his concerns to the media before the plutonium was stored once again in a safe location.What is Graf's role in this instance?

A) whistle blower
B) ethical ombudsman
C) secondary stakeholder
D) covert stakeholder