The cash flows for four investments with economic lives of 4, 5, 5 and 6 years respectively are as follows:

	A	B	C	D
k0	-2100	-2200	-2300	-1500
k1	750	650	600	400
k2	750	650	600	400
k3	750	650	700	400
k4	1000	650	700	400
k5		1000	1100	400
k6				800

The calculation interest rate for all investments is 10%.

Which of the four investments is the best financially if it is assumed that you cannot repeat the investments and you have a lack of funds (money)? A, B C or D?