Since Edna was married to Donald, she is eligible to receiveCanada Pension Plan (CPP) survivor benefits, which provide a monthly benefit to surviving spouses. Old Age Security (OAS) survivor allowance may not apply directly here as it is conditional and may not provide immediate benefits like the CPP does in this situation. Workers' Compensation does not apply as it pertains to workplace injuries, and since Donald was not injured on the job, it does not cover Edna's situation.Therefore,Option Cis correct.