According to the , the most effective management theory or idea depends on the kinds of problems or situations that managers are facing at a particular time and place."

The contingency approach

Explanation:

 The contingency approach is one of the type of management theory that helps in understanding the various types of principles in an organization and it is also refers as the situational approach.

The main objective of the contingency approach is that it provide manager the different types of ways to give reaction on the given issue and different types of situation.

 According to the question, the contingency approach helps in providing the different types of effective ideas to the manager where they facing different types of problems in an organization.  

 Therefore, contingency approach is the correct answer.

answernet income for 2017 will be greater if the inventory quantity declines;