Sam has been asked to classify a number of different processing systems that his consultancy's client uses. Sam is analyzing a processing system and he has determined that it is an online processing system and not a batch processing system.
Which of the following observations helped him determine the system?​
a.The system processing transactions completely when and where they occurb.
b. The system avoiding a constant dialog between the user and the systemc.
c. The system's tasks running on a predetermined schedule, without userinvolvementd.
d. The system allowing delays in transactions