Which of the following best places the events of the last several years in proper sequence?

a. Sarbanes-Oxley Act, increased consulting services to audit clients, Enron and other scandals, prohibition of most consulting work for audit clients, establishment of PCAOB.

b. Increased consulting services to audit clients, Sarbanes-Oxley Act, Enron and other scandals, prohibition of most consulting work for audit clients, establishment of PCAOB.

c. Enron and other scandals, Sarbanes-Oxley Act, increased consulting services to audit clients, prohibition of most consulting work for audit clients, establishment of PCAOB.

d. Increased consulting services to audit clients, Enron and other scandals, Sarbanes-Oxley Act, prohibition of most consulting work for audit clients, establishment of PCAOB.