Why does collecting data beyond five years provide little value for calculating CLV?

 a) At five years, it becomes too likely that data collected at the beginning of the cycle is no longer accurate. 

b) The discount for the cost of capital becomes so low that everything except for future revenue streams becomes irrelevant. 

c) The discount for the cost of capital becomes so high that future revenue streams have little value. 

d) None of these are correct.