Choice "C" is correct. An advantage of a centralized processing system is that processing is consistent because it is all handled at the central location.
Choice "b" is incorrect. A disadvantage of a centralized processing system is that there is a need for increased processing power and data storage at the central location because all processing must be done at the centralized location.
Choice "d" is incorrect. A disadvantage of a centralized processing system is that there can be a reduction in local accountability because all processing is handled at a central location. Local users have little responsibility and thus would not be accountable for processing errors..
Choice "a" is incorrect. A disadvantage of a centralized processing system is that there can be input/output bottlenecks at high traffic times.