Answer: MODIFY

The correct answer is B (MODIFY) because this privilege specifically grants the ability to alter warehouse properties, including resizing it. According to Snowflake documentation and community consensus with upvoted comments, MODIFY is the required privilege for changing warehouse size. ALTER (A) is a broader privilege that includes MODIFY but isn't the specific one needed. MONITOR (C) only allows viewing warehouse usage metrics, and USAGE (D) only permits using the warehouse for queries without modifying its configuration.

Author: LeetQuiz Editorial Team