At Work on a Typical Day,Kathleen,a Sales Manager,spends a Portion

At work on a typical day,Kathleen,a sales manager,spends a portion of her day talking to customers and suppliers,but she also organizes work activities and leads a team of assistants.She has to ensure that quality standards are being met within the company.This example demonstrates that

A) The functions of management are continuous and interrelated
B) Leadership is the most important function of management
C) Controlling is the most important function of management
D) The functions of management need to be delegated to a large pool of employees