Forward Prices for Gold,in Dollars Per Ounce,for the Next Five

Forward prices for gold,in dollars per ounce,for the next five years are 1350,1400,1560,1675,and 1756,respectively.A mine can be opened for 3 years at a cost of $2,000.Annual mining costs are a constant $500 and interest rates are 5.0%.When should the mine be opened to maximize NPV?

A) Year 1
B) Year 2
C) Year 3
D) Never