The cash flows for four projects are shown below, along with the cost of capital for these projects. If these projects are mutually exclusive, which one should be taken? A. Year: 0 Cash flow: - $20,000 Cost of Capital: 8.6% 1 $6000 2 $6000 3 $6000 4 $6000 5 $6000 B. Year: 0 Cash flow: - $15,000 Cost of Capital: 7.4% 1 $4000 2 $4000 3 $4000 4 $4000 5 $4000 C. Year: 0 Cash flow: - $18,000 Cost of Capital: 8% 1 $5000 2 $5000 3 $5000 4 $5000 5 $5000 D. Year: 0 Cash flow: - $12,000 Cost of Capital: 4.2% 1 $4000 2 $4000 3 $4000 4 $4000 5 $4000