A firm's annual stockholders' report . documents the list of all investors who bought the firm's shares during the past year summarizes and documents the firm's financial activities during the past year is only accessible to the shareholders of the firm summarizes and documents the firm's financial plan and budgets during the past year

summarizes and documents the firm's financial activities during the past year

Explanation:

A firm's annual report must include a comprehensive report about the firm's financial and operational activities throughout the year. The SEC requires public corporations to prepare and disclose quarterly reports (every 3 months) that are available to both stockholders and other people interested in them. Generally private companies are required to prepare at least one annual report.

c.

clarify customers’ doubts only when asked.