Which is the most appropriate statement?

a. Internal audit is a nearly full-blown profession. This means it has a clear set of professional standards and is able to work to best practice guidelines in delivering a quality service.

b. Internal audit is now a full-blown profession. This means it has a clear set of professional standards and is able to work to best practice guidelines in delivering a quality service.

c. Internal audit is now a full-blown profession. This means it has a clear set of professional standards and is able to work to best practice guidelines in delivering an okay service.

d. Internal audit is now a full-blown profession. This means it has a clear set of professional standards and is able to work to best practice legislation in delivering a quality service.