Which One of the Following Does Not Account for Why

Multiple Choice

Which one of the following does not account for why a company's strategy evolves from one version to another?

A) A desire on the part of company managers to develop new strategy elements on the fly
B) The need to abandon some strategy elements that are no longer working well
C) A need to respond to changing customer requirements and expectations
D) A need to react to fresh strategic maneuvers on the part of rival firms
E) The proactive efforts of company managers to improve this or that aspect of the strategy