An annuitant selects a 'straight life' (life-only) annuity payout option. What is the main trade-off of this choice?

解析

A straight life (life-only) option pays income for as long as the annuitant lives and stops at death, with no further payments to a beneficiary; because the insurer has no obligation beyond the annuitant's life, it provides the largest periodic payment of the pure life options. Saying it pays the smallest income because a minimum number of payments is guaranteed to heirs is backwards on both counts. Continuing the same payment to a surviving joint annuitant describes a joint-and-survivor option, not life-only. Payouts that refund unused premiums (installment or cash refund) or guarantee a period certain do protect a beneficiary, but they pay less than life-only.