Government Actual Usage of Derivatives Does NOT Include Which of the Following

Government actual usage of derivatives does NOT include which of the following?

A) China's use of put options for defending the value of their currency during the Asian financial crisis of 1997.
B) Warrants used as part of the Troubled Asset Relief Program (TARP) by the US government in 2008.
C) Use of option pricing models in connection with warrant valuation in TARP.
D) The when-issued market for US Treasury securities.
E) The callability of US Treasury securities before 1985.