Which of the Following Statements Is Correct

Which of the following statements is correct?

A) Packet switching combines the messages of multiple users into a "packet" for transmission. At the receiving end, the packet is disassembled into the individual messages and distributed to the intended users.
B) The decision to partition a database assumes that no identifiable primary user exists in the organization.
C) Packet switching is used to establish temporary connections between network devices for the duration of a communication session.
D) A deadlock is a temporary phenomenon that disrupts transaction processing. It will resolve itself when the primary computer completes processing its transaction and releases the data needed by other users.