In Which of the Following Circumstances May Auditors Issue the Standard

In which of the following circumstances may auditors issue the standard report on the entity's financial statements?

A) The entity changed accounting principles having an immaterial effect on the entity's financial position, results of operations, and cash flows.
B) The auditors wish to emphasize a matter regarding the financial statements.
C) The auditors reference component auditors who examined a subsidiary of group financial statements.
D) The auditors have not been able to audit a substantial portion of the balance sheet because of a circumstance-imposed scope limitation.