The correct answer is C (6 minutes) based on Snowflake's multi-cluster warehouse scaling policies. The Economy scaling policy is designed to minimize costs by waiting longer before spinning up additional clusters. According to Snowflake documentation and the community discussion consensus (with 100% agreement and upvoted comments), queries will wait 6 minutes in the queue before another cluster is started under the Economy policy. This contrasts with the Standard scaling policy, which initiates additional clusters immediately when needed. The other options (1 minute, 2 minutes, and 8 minutes) do not align with Snowflake's documented scaling policy timings for the Economy setting.