Galaxy Limited Is a Listed Company Operating in Retail Industry

Galaxy Limited is a listed company operating in retail industry with three business units: Milky Way, Andromeda, and Whirlpool. Which of the followings is likely to be the key management personnel of Galaxy Limited?

A) The general manager of Milky Way;
B) The managing director's personal assistant;
C) The company's auditor;
D) The company's IT manager.