What was the main importance of the Roman Twelve Tables for common citizens?

Correct answer: Laws became written and more public

The direct answer is A: laws became written and more public. The Roman Twelve Tables were an early written statement of Roman laws, traditionally produced in the fifth century BCE. Step by step: before written publication, legal knowledge could be controlled by powerful officials; ordinary people could find it difficult to know the rules; writing the laws on publicly displayed tablets made the rules more visible and helped people refer to them; this supported the development of Roman legal tradition. Option A is correct because it identifies their main civic importance. Option B, easier mummification, belongs mainly to ancient Egyptian religious practice and has no connection with Roman law. Option C, increased silk trade, concerns long-distance commerce and is not the purpose of the Twelve Tables. Option D, Maya counting, belongs to Maya mathematical history, not Rome. The memory cue is: Twelve Tables equals Rome, written law and public knowledge. Do not assume they created full equality; their important point here is making laws written and more accessible.