Supply Chain Management Is Essentially the Optimisation of Material Flows

Supply chain management is essentially the optimisation of material flows and associated information flows involved with an organisation's operations. To manage these flows, e-business applications are essential to bring such benefits as noted in 'Internet retailing' in 2010 which reported that the average rates of return to a high street retailer could be as high as 10%. What did the same source report as the average rate of return for UK e-commerce sites?

A) 15%
B) 22%
C) 12%
D) 18%