Choice "A" is correct. Because the auditor is concerned with events occurring through the date of the audit report that may require adjustment to or disclosure in the financial statements, the management representation letter should be dated as of the date of the auditor's report.
Choice "d" is incorrect. The management representation letter is dated as of the date of the auditor's report, which is generally after the balance sheet date.
Choice "c" is incorrect. The management representation letter is dated as of the date of the auditor's report, which is unrelated to the date of the latest interim financial information.
Choice "b" is incorrect. The management representation letter is dated as of the date of the auditor's report, which is unrelated to the dates of related party transactions.