Answer:
A) It will decrease prior service cost and, as prior service cost is amortized, will decrease pension expense.
Step-by-step explanation:
Prior service cost is the cost of additional benefits that an employee is entitled to receive for service rendered over a period of time due to an amendment in pension plan.
Prior service cost is amortized by adding equal amount to each future period of service of each employee that are expected to receive the benefits of the amended pension plan.
Therefore,due to the extended retirement age, the prior service cost will increase and as the service cost is amortized, it will decrease the pension expenses of the company.