You are a lawyer. The police have charged one of your clients with murder. However, she insists that she committed the crime in self-defense. Which principle of classical theory will form a strong foundation for your argument in the case?

A. People are rational and make choices that are beneficial to them.

B. Punishment deters people.

C. Punishment should be swift.

D. People have free will.

E. People commit crime because it is beyond their control.

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