Which is true about the differences between a port replicator and a docking station?
both have expansion ports
neither have expansion ports
only docking stations have expansion slots
only port replicators have expansion slots

C.) Only docking stations have expansion slots

Explanation:

Port Replicators offer the same functionality found in docking stations but are more universal. Port replicators don't require the laptop to be clipped into a docking port, as docking stations do. Instead, the replicator device connects through a simple USB port, commonly found on any laptop made today. A port replicator is similar to a docking station , but does not include expansion slot .

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.

continuous information you receive.