Which of the following statements is TRUE?

Select one:

a$.$ Investments in IT to improve efficiency are easier to justify in an accounting sense than IT investments targeting doing the right things

b$.$ Investment in IT leads to sustained competitive advantage

c$.$ Efficiency is about doing the right things such as allowing customers $\frac{24}{7}$ access to their accounts and order status

d$.$ Effectiveness is to do more with same or fewer resources