An investor purchases zero-coupon bonds issued by the U.S. Treasury due to mature in 18 years at $100,000. Which of the following might describe the primary reason for selecting that investment vehicle?1. The investor is 65 years old and needs the reliability of current income.2. The investor is 45 years old and has purchased these in an IRA rollover account and wants the assurance of funds for retirement.3. The investor is 30 years old and has a newborn child and wishes to assure funds for a college education.4. The investor is 20 years old, has just received an inheritance, and wishes to shelter income for as long as possible.