Which of the Following Illustrates the Use of Information Systems

Which of the following illustrates the use of information systems to achieve product differentiation?

A) A hot tub dealer's use of information systems to determine which models and options its customers are most likely to buy
B) A shoe manufacturer's use of information systems in selling custom, made-to-order shoes directly to customers
C) A PC manufacturer's use of information systems to facilitate direct access from suppliers to production schedules
D) A grocery store chain's use of information systems to produce products and services at a lower price than competitors
E) A hotel chain's use of information systems to analyze detailed data on guests to determine each guest's profitability