please explain

Having one employee prepare company checks and sign those checks relates to which internal control activity? a violation of proper segregation of duties a violation of adequate documents and records a good example of checks on recorded amounts a good example of clearly defined authority and responsiblity Which of the following is not a requirement of a company's top managers under the Sarbanes-Oxley Act? They must give an opinion about the effectiveness of the company's internal control over financial reporting. They must certify that they are primarily responsible for the company's internal controls over financial reporting. They must certify that the company's financial statements are fairly presented. They may deny responsibility for certain financal reporting matters if they are not knowledgeable about the proper accounting procedures for those transactions