A firm has three 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 $$10$ million at the end of three years. Option B will give the firm $$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 C will give the firm $$30$ million at the end of one year, and nothing thereafter. Which of these options has the highest present value?