8. One of the steps in the data processing cycle is data input. What is the catalyst for data input into a system? a) The production transaction system automatically checks each hour to see if any new data is available for input and processing. b) The performance of some business activity generally serves as the trigger for data input. c) A general ledger program is queried to produce a trial balance at the end of an accounting period. d) Data is only input when an authorized partv permits the input to occur