please answer fast, will upvote!

13 Beau and Kala are both 60 years old; they have decided to retire and commence receiving their Canada Pension Plan benefits. They have each worked for 28 years, they have been spouses for 21 of these years. Beau is entitled to a Canada Pension Plan payment of $500 monthly. Kala's Canada Pension Plan benefits are $300 monthly. If they choose to assign their pensions, what amount of benefit will Kala receive? a) $187 Ob) $225 O c) $375 O d) $425