Given That WRSX Has Been Built Up from a Series

Given that WRSX has been built up from a series of mergers and acquisitions and has multiple businesses and has several partners, which of the following approaches to managing change is most likely to be effective?

A) An approach to change which is built on collaboration and participation.
B) An approach to change which is built on edict and coercion.
C) An approach to change which is directed from the centre and imposed on subsidiaries.
D) WRSX is doing well in all of its businesses so there is no need for significant change.