When using estimates to make decisions,

	A.	It is important to always use a 95% confidence level
	B.	It is important to remember that you will never achieve certainty
	C.	It is important to calculate those estimates to at least six decimal places
	D.	It is important to use a 100% confidence level so as to achieve certainty
	E.	All of the above
	F.	None of the above