Under a 'cash refund' life annuity option, if the annuitant dies before receiving payments equal to the amount paid in, the beneficiary receives:

解析

A cash refund option pays the annuitant for life, and if the annuitant dies before the sum of the payments equals the amount paid in, the beneficiary receives the remaining difference in a lump sum, ensuring at least the purchase amount is returned. It does not pay nothing (that would be straight life), does not double the deposit, and does not grant the beneficiary lifetime income. The refund feature guarantees the principal is not lost to an early death, at the cost of a smaller payment.