Approaches to enhancing differentiation through changes in the value chain do NOT include:
A) coordinating with retailers to enhance the buying experience and building a company's image.
b) coordinating with suppliers to speed up new product development cycles.
c) coordinating with distributors or shippers to lower shipping costs.
d) collaborating with suppliers to improve many dimensions affecting product features and quality.
e) coordinating with employees to create a greater incentive systems to encourage worker productivity