In which of the following circumstances would an auditor be most likely to express an adverse opinion?

a. Information comes to the auditor's attention that raises substantial doubt about the entity's ability to continue as a going concern.

b. The chief executive officer refuses the auditor access to minutes of board of directors meetings.

c. The statements are not in conformity with the FASB Statements regarding the capitalization of leases.

d. Tests of controls show that the entity's control risk must be assessed at the maximum level.