Question

Punishing someone for an action that did not used to be a crime is an example of

an ex post facto law.
habeas corpus.
a “necessary and proper” law.
a bill of attainder.

Answers

Answered by GPT-5 mini
an ex post facto law.

Explanation: An ex post facto law retroactively criminalizes conduct (or increases the punishment for conduct) that was legal when committed. The Constitution prohibits such laws.
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