Answer: Before it is sent from the user's machine

The PUT command in Snowflake encrypts data before it leaves the user's machine (option C). This is confirmed by the community discussion where all participants selected C with 100% consensus and upvotes. The PUT command is used to upload files from a local machine to a Snowflake stage, and Snowflake encrypts the data client-side before transmission to ensure security during transit. Options A, B, and D are incorrect because encryption occurs before the data reaches the virtual warehouse, before micro-partitioning (which happens after loading), and before reaching the internal stage, respectively.

Author: LeetQuiz Editorial Team