For each of the projects shown below, calculate the internal rate of return. Given your results, if the company's cost of capital is 22%, which of these projects should the company invest in?

Year	Project A: CF	Project B: CF	Project C: CF	Project D: CF
0	-90,000	-490,000	-20,000	-240,000
1	20,000	150,000	7,500	120,000
2	25,000	150,000	7,500	100,000
3	30,000	150,000	7,500	80,000
4	35,000	150,000	7,500	60,000
5	40,000		7,500

	a.	A
	b.	B
	c.	C
	d.	D