please give me right answer thanks ! single choice

Which of the following is not considered a "borrowing cost" under IAS 23?

A.Interest expense calculated by the effective interest method under IFRS 9

B.Interest in respect of lease liabilities recognised in accordance with IFRS 16

C.Principal repayments on a loan for property, plant and equipment

D.Exchange differences arising from foreign currency borrowings to the extent that they are regarded as an adjustment to interest costs