Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Interest paid is classified as an operating cash flow under:
Option A:US GAAP but may be classified as either operating or investing cash flows under IFRS.
Option B:IFRS but may be classified as either operating or investing cash flows under US GAAP.
Option C:US GAAP but may be classified as either operating or financing cash flows under IFRS.

Answer: C