The use of IT leads to competitive benefits and advantages. However, it is becoming increasingly important to ask whether these advantages are sustainable. Select from the following ways that competitive advantage can be sustained via IT (select all that apply): a. Continually improve the IT system by finding better ways to leverage existing technologies and being smart about new technology adoption. b. Leverage information to make quick decisions and match the pace of organizational change with the current market trends. c. Tailor the system to the organization, design for organization-specific processes and strategic approaches. d. Avoid using proprietary systems because they are difficult to maintain e. Build IT systems that are inexpensive to replicate to avoid having to overpay for scarce IT staff with niche skills