What Information Does a Firm's Statement of Cash Flows Provide

What information does a firm's statement of cash flows provide to the viewing public?

A) a report of investments made and their cost for a specific period of time
B) a report documenting a firm's cash inflows and cash outflows from operating, financing, and investing activities for a defined period of time
C) a report of revenues and expenses for a defined period of time
D) an itemization of all of a firm's assets, liabilities, and equity for a defined period of time