Which clause in Article I, Section 10 prohibits states from passing laws that retroactively criminalise an action or from singling out individuals for punishment without trial?

• A Ex post facto and Bills of Attainder clauses ✓
• B Contract Clause
• C Commerce Clause
• D Emoluments Clause

Both the federal government (Article I, Section 9) and the states (Article I, Section 10) are prohibited from passing bills of attainder (legislative punishment) and ex post facto laws (retroactive criminalisation).