Improvement in supply chain performance at the result of distributors occurs for which of the ...

Improvement in supply chain performance at the result of distributors occurs for which of the following reasons?
A) Reduction in transportation cost because of LTL shipments from manufacturers to distributor.
B) Reduction in outbound transportation cost because the distributor combines products from many customers into a single outbound shipment.
C) Reduction in inventory costs because distributor disaggregates safety inventory rather than aggregating at each retailer.
D) A more stable order stream from distributor to manufacturer (compared to erratic orders from each retailer) allows manufacturers to lower cost by planning production more effectively.