Where a change in accounting estimates occurs, which of the following should be disclosed?

	A.	The nature of the change and the impact on previous income statements
	B.	The fact that the amount of the effect on future periods will not be disclosed because estimating that amount is impracticable and the reason for the change and comparative data to show the impact with and without the change
	C.	The fact that the amount of the effect on future periods will not be disclosed because estimating that amount is impracticable
	D.	The reason for the change and comparative data to show the effect with and without the change