The options presented do not accurately reflect the connection between river valley civilizations and classical civilizations in terms of law as a cultural practice. The correct response is:
The river valley civilizations, such as the Mesopotamian and Egyptian civilizations, developed early legal systems that influenced later classical civilizations, including the Laws of the Twelve Tables in ancient Rome. These early legal systems, like Hammurabi's Code in Mesopotamia, laid the foundation for the development of more complex and sophisticated legal systems in classical civilizations.