Which of the following best describes why an independent auditor is engaged to express an opinion on the fair presentation of financial statements?

a$.$ The opinion of an independent party is needed because a company is not likely to be considered objective with respect to its own financial statements.

b$.$ It is difficult to prepare financial statements that fairly present a company's financial position and changes in cash flows without the expertise of an independent auditor.

c$.$ It is a customary courtesy that all stockholders of a company receive an independent report on management's stewardship in managing the affairs of the business.

d$.$ It is management's responsibility to seek available independent aid in the appraisal of the financial information shown in its financial statements.