The client-server model,
a. Is most effective when used as a bus topology, because its deterministic access method avoids collisions and prevents data loss during transmissions.
b. Is best suited to the token ring topology, because the random-access method this topology uses detects data collisions.
c. Is more efficient than the bus or ring topologies, because it transmits an entire file of records to the requesting node rather than  only a single record.
d. Distributes both data and processing tasks to the server node. The client-server model can use the bus or ring topology.
e. Is not used in conjunction with either the bus or ring topology.