Which of the Following Decisions Would Involve the Use of the Present

Which of the following decisions would involve the use of the present value of $1?

A) Your brother buys your car and offers to pay you $500 per year for three years or $1,500 in two years.
B) You win a lawsuit and are offered a lump-sum payment today of $100,000 or $15,000 a year for 20 years.
C) Your father and mother wish to deposit enough money on the date of your high school graduation to enable you to take a $7,000 cruise when you graduate from college in 4 years.
D) You want to have $1,000,000 in order to retire at age 55, but need to know how much you will need to deposit each year from now until your 55th birthday.