A firm has four different investment options. Option A will give the firm $10 million at the end of one year, $10 million at the end of two years, and $10 million at the end of three years. Option B will give the firm $5 million at the end of one year, $10 million at the end of two years, and $15 million at the end of three years. Option C will give the firm $15 million at the end of one year, $10 million at the end of two years, and $5 million at the end of three years. Option D will give the firm $21 million at the end of one year, nothing at the end of two years, and $9 million at the end of three years. Which of these options has the highest present value if the rate of interest is 5 percent