Which of the following statements about supply chain management is true?

a$.$ It has emerged as a significant source of competitive advantage.

b$.$ It is a means to bring up the standard of living of many people all over the world.

c$.$ We have made most of the gains we can make in SCM globally.

d$.$ Both a and $b$

When you define the issues in scenario analysis...

You look for common drivers across scenarios

You look at your business issues, independent of the scenarios

You look for the answers to your many problems

You consider the key factors that will affect each scenario, should it come to pass