Choice "D" is correct. All of the statements are correct. The IT department is a support group and normally does not initiate or authorize transactions. When it does initiate or authorize transactions, those transactions normally are for such activities as leasing hardware, paying software license fees, and other IT-related activities. In general, segregation of duties is defined as dividing responsibilities for different portions of a transaction (authorization, recording, and custody) among several different people or departments. This definition is true in an IT environment or with systems, but it is sometimes harder to accomplish in an IT environment since software may perform many of the functions. Segregation of duties in an IT environment normally revolves around granting and/or restricting access to production programs and to production data.Choices "a", "c", and "b" are incorrect, per the above explanation.