The correct answer is: B. written delegation.
Delegation made by written orders and instruction is known as written delegation. It is a formal way of delegating tasks and responsibilities. It is often used in business settings, where it is important to have a clear record of what has been delegated and who is responsible for what.
Oral delegation is a less formal way of delegating tasks and responsibilities. It is often used in casual settings, where it is not necessary to have a written record of what has been delegated.
Downward delegation is a type of delegation in which a higher-level employee delegates tasks and responsibilities to a lower-level employee.
Sideward delegation is a type of delegation in which an employee delegates tasks and responsibilities to a colleague at the same level.