In Ontario, the pension legislation stipulates that a spouse is entitled to receive a minimum of 50% of the member’s pension benefits as a survivor benefit if the member dies. This applies to defined benefit pension plans (DBPP), which provide a predetermined benefit upon retirement.Therefore, as the spouse of Maria, Juan would be entitled to receive at least half of Maria’s pension upon her death, as specified by Ontario pension regulations. This survivor benefit is a guaranteed right and requires consent from both spouses for any reduction or waiver. Options C and D are incorrect as Ontario law mandates a minimum 50% survivor benefit without provision for reduction to 25%, and Juan's entitlement is tied to their marital status and statutory rights, which may not apply if they are separated or divorced at the time of Maria's death. Option A is incorrect because Ontario legislation does not provide for an increased benefit by waiving the survivor benefit​​.