a. Accounting systems that must follow GAAP must adhere to generally accepted accounting principles (GAAP) in order to produce accurate financial reports. These principles include standards for the recognition, measurement, and disclosure of financial transactions. b. External parties for whom financial accounting reports are prepared include investors, creditors, regulators, and other stakeholders. These parties rely on the accuracy of the financial data to make informed decisions. c. The role managers play when they are monitoring day-to-day operations and keeping the company on track is to ensure that the company is meeting its goals and objectives. This includes monitoring performance, analyzing data, creating budgets, and developing strategies. d. Internal decision makers are those within the company who use financial information to make decisions. This includes executives, managers, and other personnel who use financial data to make decisions about the future of the company.