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? $2000 $2000 $2000 $2000 $2000 0 $2500 $2500 $2500 $2500 $2,500 O A. Year: Cash flow: -$5000 Cost of Capital: 6.1% O B. Year: Cash flow: - $6000 Cost of Capital: 7.4% O C. Year: Cash flow: -$7000 Cost of Capital: 7.8% OD. Year: 0 Cash flow: - $8000 Cost of Capital: 9.5% $3000 $3000 $3000 $3000 $3000 $3200 2 $3200 $3200 $3200 $3200