According to IIA guidance, which of the following statements is true regarding internal auditors' knowledge,...

The chief audit executive (CAE) must obtain competent advice and assistance if the internal audit activity lacks the knowledge, skills, or other competencies needed to complete the audit engagement

Internal auditors must have sufficient knowledge to evaluate the risk of fraud and the manner in which it is managed by the organization and should have the expertise of a fraud investigator

Internal auditors need to have basic knowledge of key IT risks and controls and available technology-based audit techniques in order to perform their assigned work

The CAE must refuse a consulting engagement if the internal audit activity lacks the knowledge, skills, or other competencies needed to perform all or part of the engagement