Answer:
The correct answer is letter "E": Persuade forward channel allies to implement best practices.
Step-by-step explanation:
Among common methods to deal with supplier related cost disadvantages, we can implement pressing suppliers for better prices, moving to lower-priced alternative products and working closely to find cost-saving opportunities for each of the parties involved.
Firm best practices imply different factors from the organization not only operational but ethical. Thus, it is not directly related to remedying a supplier-related cost disadvantage.