Step 1: Understand the different ways the word "management" is used.
Management can be used as a process (set of activities), as a discipline (body of knowledge), or as a group (collective noun referring to people).
Step 2: Focus on management as a group or collective noun.
When we say "the management of this company," we refer to all the people who are responsible for directing the organisation's work - from the CEO at the top to first-line supervisors on the shop floor.
Step 3: Eliminate "Only the CEO".
One person cannot represent the entire managerial group. The CEO is just the highest level within that group.
Step 4: Eliminate "Employees of the organisation".
This is too broad. It includes workers on the shop floor or in the field who perform operative tasks and do not manage others.
Step 5: Eliminate "Administrative staff".
Administrative or clerical staff handle support functions and documentation. They are not necessarily managers directing the work of others.
Step 6: Confirm the correct answer.
"All individuals managing organisational tasks" - regardless of their level - constitute what is collectively called management as a group.
\[ \boxed{ \text{(D) All individuals managing organisational tasks} } \]