Answer: Option A
Explanation: In simple words the management of flow of good or services is called supply chain management. It is the chain of processes transforming raw materials into final product and then distributing to customers.
a. In a supply chain management every step is dependent on one other thus one weak link will adversely effect every other step.
b. Distribution of final product to customer is the last step.
c. Effective supply chain management can improve the operations of firm altogether.
d. An effective supply chain management can result in reduction of waste and less use in energy etc., thus, reducing carbon footprints.
Therefore, option a is correct.