What is life-cycle budgeting? 
A. An estimate of the total revenues and costs a company expects to record from its initial opening to its probable closing.
B. An estimate of the revenues and costs attributable to each product from its initial R&D to its final customer servicing and support.
C. An estimate of the costs attributable to each product from its initial R&D to its sale.
D. An estimate of the time and resources it will take to collect revenue from each customer.