Which of the Following Are Obstacles to Changing Organisational Culture

Which of the following are obstacles to changing organisational culture? Select ALL that apply.

A)
Changing cultures requires changing people's deeply held beliefs.
B)
Some cultures enhance organisational performance, while others hinder it.
C)
Even if a culture is changed, it's likely to change back.
D)
Managers may sometimes inadvertently revert to old patterns of behaviour.
E)
Value systems are self-reinforcing.