Which of the Following Explain Why It Is Often Difficult

Which of the following explain why it is often difficult for managers to identify strategic drift? Choose all that apply.

A) Managers may be over- enthusiastic about adopting new policies.
B) Changes are not always easy to see without the benefit of hindsight.
C) The core competences that created advantage may be exactly the same as the core rigidities that are creating drift.
D) Performance may not suffer significantly during the early stages of drift.