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%