(1.2) Which of the following statement is true? (a). In packet-switched networks, the resources needed along a path to provide for communication between the end systems are reserved duration of the communication session (b). In packet-switched networks, all packets are always delivered over the same path which is established by connection set-up steps. (c). The packet-switched network can be wasteful when the dedicated circuits are idle during silent period. (d). The packet-switched network offers better sharing of bandwidth than the circuit-switched network. (e). All of the above