Correct Option: C Explanation of Why Option C is Correct: An effective accounting system is designed to provide relevant and accurate information that supports decision-making for various stakeholders. Option C states that the accounting system should provide information on internal and external reporting for managers and third parties. This is crucial for several reasons:

1. Internal Reporting: Managers need timely and accurate financial information to make informed decisions about the operations of the business. This includes budgeting, forecasting, and performance evaluation. Internal reports help managers understand the financial health of the organization and guide strategic planning.
2. External Reporting: Third parties, such as investors, creditors, and regulatory bodies, require financial statements to assess the company's performance and financial position. These reports must comply with accounting standards (like GAAP or IFRS) to ensure transparency and comparability.
3. Stakeholder Communication: An effective accounting system facilitates communication between the organization and its stakeholders. By providing clear and comprehensive reports, it builds trust and credibility, which are essential for maintaining good relationships with investors, customers, and regulatory authorities.
4. Compliance and Accountability: Accurate internal and external reporting ensures that the organization complies with legal and regulatory requirements. This accountability is vital for sustaining the business's reputation and avoiding legal issues.

Why the Other Options Are Weaker:

• Option A: on new product and methods
• While information on new products and methods can be beneficial, it is not the primary focus of an accounting system. Accounting systems are primarily concerned with financial data rather than operational or product development information. Therefore, this option does not capture the core purpose of an effective accounting system.
• Option B: for customer feedback and requirement
• Customer feedback is essential for business growth and improvement, but it falls outside the scope of what an accounting system is designed to provide. Accounting systems focus on financial transactions and reporting rather than qualitative data related to customer satisfaction or preferences.
• Option D: for promoters, directors, labour union and distributors
• While this option mentions various stakeholders, it is too broad and does not emphasize the critical aspect of internal and external reporting. An effective accounting system must cater to the specific reporting needs of managers and third parties, which is not clearly articulated in this option.

Summary of Key Points:

• An effective accounting system provides essential information for both internal and external reporting.
• Internal reports support managerial decision-making, while external reports ensure compliance and transparency for stakeholders.
• The focus of an accounting system is on financial data, not operational or customer feedback information.
• Clear and accurate reporting builds trust and accountability with stakeholders.

By understanding these concepts, students can appreciate the importance of a robust accounting system in facilitating informed decision-making and maintaining stakeholder relationships.