Answer:
lifetime annuity with period certain settlement option
Explanation:
Based on the specifications that Tom is looking for, he should consider the lifetime annuity with period certain settlement option. This is an annuity that pays a benefit to the annuitant until death, but with a period certain option, the estate's beneficiary will continue to receive annuity payments until the specified timeframe of the period certain expires. Which would meet the requirements that Tom is looking for.