The Cash Flows for Four Projects Are Shown Below, Along

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 1 2 3 4 5 Cash flow: -$20,000 $6000 $6000 $6000 $6000 $6000
Cost of Capital: 8.2%
B) Year: 0 1 2 3 4 5 Cash flow: -$15,000 $4000 $4000 $4000 $4000 $4000
Cost of Capital: 7.0%
C) Year: 0 1 2 3 4 5 Cash flow: -$18,000 $5000 $5000 $5000 $5000 $5000
Cost of Capital: 7.6%
D) Year: 0 1 2 3 4 5 Cash flow: -$12,000 $4000 $4000 $4000 $4000 $4000
Cost of Capital: 5.0%