Final answer:
The largest NCAA expense category is usually the Distribution to Division 1 members, as they allocate most of their revenue to support collegiate athletic programs and scholarships.
Step-by-step explanation:
The largest expense category for the NCAA is typically Distribution to Division 1 members. The NCAA generates revenue mainly from television and marketing rights fees, ticket sales for championship events, and other sources.
The majority of this revenue is distributed to Division I institutions to support athletics programs, scholarships, and other expenses related to student-athletes. This distribution accounts for a substantial portion of the NCAA's total expenses each year, more so than spending on championships, programs, or facility maintenance.