The question asks for the MINIMUM Snowflake edition required for periodic rekeying of micro-partitions. According to the community discussion and the referenced Snowflake documentation, periodic rekeying requires Enterprise Edition or higher. The community consensus (100% selected A, with multiple comments referencing the official documentation) confirms that Enterprise is the minimum edition. Business Critical (B) is a higher edition that also supports this feature but is not the minimum. Standard (C) and Virtual Private Snowflake (D) do not meet the minimum requirement for periodic rekeying.