Choice "B" is correct. A proposed accounting standards update is prepared by the FASB as part of the due-process activities.Choice "c" is incorrect. A proposed statement of position is issued by the American Institute of Certified Public Accountants (AICPA) and not the FASB.Choice "a" is incorrect. A proposed accounting research bulletin is not a document issued as part of the due-process activities of the FASB for amending the FASB Accounting Standards Codification. Accounting research bulletins were never issued by the FASB, and are no longer issued at all.Choice "d" is incorrect. A proposed staff accounting bulletin is issued by the U.S. Securities and Exchange Commission (SEC) and is not part of the due-process activities of the Financial Accounting Standards Board (FASB) for amending the FASB Accounting Standards Codification.