Robert Ochoifeoma Is a New Supervisory Manager at Hearthside Restaurant

Robert Ochoifeoma is a new supervisory manager at Hearthside Restaurant Supply Company. He wants to know the name and title of his supervisor's supervisor as well as the names and titles of the people whom that person oversees. He needs to look at

A) the company's telephone directory.
B) his supervisor's resume.
C) the company's email contacts list.
D) the company's organization chart.
E) the company's emergency contacts list.