Answer: HOST

According to the Snowflake documentation referenced in the community discussion, environment variables in SnowSQL can only be used to pre-specify certain command line parameter values, specifically password, host, and database. Among the given options, HOST (option A) is explicitly mentioned as one of these pre-specifiable parameters. The community discussion shows 100% consensus on option A with 4 upvotes, confirming this is the correct answer. Options B (VARIABLE), C (OPTION), and D (MFA-PASSCODE) are not listed as parameters that can be pre-specified via environment variables according to the official documentation.

Author: LeetQuiz Editorial Team