According to the video lectures, which of the following is true about the centralized data processing model and the distributed data processing model of AIS? a. In the centralized model, only the centralized computer accesses the central corporate data, whereas in the distributed model, each user client computer has access b. In the distributed model, only user clients process transaction data, whereas in the centralized model, both user clients and the centralized computer do c. None of the above d. In both models, user clients are directed connected via a network