Which of the following statements best describes an auditor's responsibility to detect errors and fraud?

a. The auditor should study and evaluate the client's internal control, and design the audit to provide reasonable assurance of detecting all errors and fraud.

b. The auditor should assess the risk that errors and fraud may cause the financial statements to contain material misstatements, and determine whether the necessary internal controls are prescribed and are being followed satisfactorily.

c. The auditor should consider the types of errors and fraud that could occur, and determine whether the necessary internal controls are prescribed and are being followed.

d. The auditor should assess the risk that errors and fraud may cause the financial statements to contain material misstatements, and design the audit to provide reasonable assurance of detecting material errors and fraud.