What is the term for detaining someone with the intention to harm or kill them if certain demands are not fulfilled?

Explanation

Option A refers to seizure, which is a general term for taking control. Option B, unlawful detention, means holding someone without legal authority but lacks the threat element. Option C, hostage-taking, specifically involves holding a person captive with threats to harm or kill if demands are unmet. Option D indicates none of the provided choices are correct.