Answer: a way to decentralize planning or promote strategy as an emergent process within his organization.
Explanation: In simple words, Decentralization refers to the transfer of responsibility from one to another. Usually it is seen as downward in case of business organisations, that is, from seniors to subordinates.
In the given case, Nishimatsu open door policy and cafeteria meeting is a way to make flow of information and ideas from one individual to another.
Hence from the above we can conclude that the correct option is A .