Answer: COPY INTO [location]

Based on the community discussion and Snowflake documentation, only the COPY INTO [location] command can be executed from a reader account. Reader accounts have limited permissions and cannot execute most DML and DDL commands. The discussion clearly shows that INSERT, CREATE SHARE, and SHOW PROCEDURES are explicitly listed as commands that cannot be executed in reader accounts, while COPY INTO <location> (for unloading data) is permitted. The highest upvoted comments (6 and 5 upvotes) confirm that D is the correct answer, with detailed documentation references showing that reader accounts can only use COPY INTO to unload data to external cloud storage locations.

Author: LeetQuiz Editorial Team