In the field of cryptanalysis, what is meant by a “rubber-hose” attack?

In the field of cryptanalysis, what is meant by a “rubber-hose” attack?
A . Forcing the targeted keystream through a hardware-accelerated device such as an ASI
C . A backdoor placed into a cryptographic algorithm by its creator.
D . Extraction of cryptographic secrets through coercion or torture.
E . Attempting to decrypt ciphertext by making logical assumptions about the contents of the original plaintext.

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Answer: C