Answer is A
An Ethernet hub functions as repeater. There are plenty of functions which an Ethernet hub performs.
The primary function of the Ethernet hub is to connect the different cable segments.
It also helps in transmitting the data to other devices which are part of the network system. Before the signals are transmitted to the other devices in the system, the Ethernet hubs also repeat it.
The Ethernet hub could be manipulated to support the Simple Network Management Protocol or SNMP.