1. Assurance services may improve all of the following except

1. Relevance.

2. Credibility.

3. Periodicity.

4. Reliability.

2. The Public Company Accounting Oversight Board is responsible to

1. Conduct the final review of auditors' work before the auditor's opinion is issued.

2. Oversee the auditors of public companies in order to protect the interests of investors.

3. Conduct audits of governmental entities.

4. Sanction auditors who fail to follow GAAS.

3. The first PCAOB general standard requires that the examination of financial statements is to be performed by a person or persons having adequate technical training and

1. Independence with respect to the financial statements and supplementary disclosures.

2. Exercising professional care as judged by peer reviewers.

3. Proficiency as an auditor, which likely has been acquired from previous experience.

4. Objectivity as an auditor as verified by proper supervision.