Answer:
The beneficiary should receive 6 more years of payment.
Step-by-step explanation:
An annuity certain option guarantees that the insured or his/her beneficiaries will receive payments for a minimum period of time in case the insured dies.
In this question the certain option was 10 years, during the first 4 years the insured received his/her annuity payments, but once the insured passed away, his/her beneficiaries will continue to receive payments until the 10 year period ends (6 more years).