正解:B
VALIDATE is a Snowflake table function for examining files processed by a previous COPY INTO < table > operation. The caller supplies the target table and either the COPY query ID or _last, and the function returns all load errors encountered for that execution rather than only the first error. LIST displays files in a stage, RESULT_SCAN returns the result set of a prior query, and COPY_HISTORY reports load activity and status; none is the dedicated function for returning every row-level parsing or conversion error from a specific past COPY execution. VALIDATE has usage limitations, including cases where the original COPY used ON_ERROR = ABORT_STATEMENT, but among the supplied choices it is the verified function for this troubleshooting task.