A foreign subsidiary has earned income evenly over the year and it has paid its income taxes for the year in two instalments, half on June 30 and half on December 31. Assuming the foreign subsidiary's functional currency is the same as the parent's functional currency, what rate(s) should be used to translate the foreign subsidiary's income tax expense into Canadian dollars when preparing translated financial statements for the year ended December 31? Select one: A. All at the opening rate for the year. B. All at the average rate for the year. C. Half at the rate at June 30 and half at the rate at December 31. D. All at the closing rate for the year.