Final answer:
A cash-flow budget estimates future income and expenditures over a specific period, aiding financial planning and decision-making.
Step-by-step explanation:
The statement that best defines a cash-flow budget is c. it represents an estimate of income and expenditures. A cash-flow budget is a financial tool used by organizations or individuals to project future income and expenditures over a specific period of time. This budget helps in determining whether the finances can support the planned activities and assists in decision-making regarding spending, investment, and funding.