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.

Derivatives may contribute to financial contagion because of the:
Option A:centrally cleared nature of OTC derivatives.
Option B:associated significant costs and high capital requirements.
Option C:reliance by derivatives speculators on large amounts of leverage.

Answer: C