Answer: Troubleshoot network connections to Snowflake.

SnowCD (Snowflake Connector Diagnostics) is a command-line tool specifically designed to help Snowflake users troubleshoot network connectivity issues to Snowflake. The official Snowflake documentation confirms that SnowCD validates network connectivity and performance between client machines and Snowflake services. Option C directly aligns with this purpose. Option A (copy data into files) is typically handled by SnowSQL or other data loading tools. Option B (manage databases and schemas) is performed through SQL commands or the web interface. Option D (write SELECT queries for external tables) is done using standard SQL queries, not SnowCD. The community discussion shows 100% consensus on C with references to official documentation, further confirming this is the correct answer.

Author: LeetQuiz Editorial Team