On July 31, 20X8, Tern Co. amended its single employee defined benefit pension plan by granting increased benefits for services provided prior to 20X8. This prior service cost will be reflected in the financial statement(s) for
a. Years before 20X8 only
b. Year 20X8
c. Year 20X8, and years before and following 20X8
d. Year 20X8, and following years only