Ten Years Ago, Southwest Auto Parts Would Ship a Standard

Ten years ago, Southwest Auto Parts would ship a standard number of various parts to all of its 147 locations once a month. Today, Southwest's more sophisticated inventory system monitors the stock at each location and adjusts the number of each part accordingly in the monthly shipment to each store in order to prevent under- or overstocking the stores on any given part. Within an integrated supply chain, this is an example of change in:

A) product flow.
B) information flow.
C) cash flow.
D) demand flow.