In data acquisition system, analog data acquisition system is used

• A. for narrow frequency width, while digital data acquisition system is used when wide frequency width is to be monitored
• B. for wide frequency width, while digital data acquisition system is used when narrow frequency width is to be monitored
• C. when quantity to be monitored varies slowly, while its counterpart is preferred if the quantity to be monitored varies very fast
• D. when quantity to be monitored is time-variant, while digital data acquisition system is preferred when quantity is time-invariant