Final answer:
A pure life annuity is a type of financial product that provides a guaranteed income stream in retirement. The income is payable only for the life of the annuitant.
Step-by-step explanation:
A pure life annuity is a financial product offered by insurance companies as a way to provide a guaranteed income stream in retirement. Under a pure life annuity, the income is payable only for the life of the annuitant, option D. It does not continue for a guaranteed period of time, whether or not the annuitant survives to the end of that period (option A), nor does it continue for as long as either the annuitant or a named beneficiary is alive (option B).