Back-office operations support the processing, settlement, recordkeeping, and administrative infrastructure of an investment dealer. Information technology is a clear back-office function because dealers rely on systems for order routing, trade processing, client records, cybersecurity, statements, reporting, and operational controls. Research is generally a front-office or client-facing support function because it helps sales, trading, and advisory personnel generate investment ideas. Compliance is often considered an independent control or middle-office function, although it interacts closely with all business areas. Corporate treasury manages the firm’s funding and capital resources, but it is not the best example of routine back-office operations in this question. Information technology is the most appropriate answer because it directly supports operational infrastructure.