Although fiber-optic telephone cable is more expensive to manufacture than copper telephone cable, a telephone network using fiber-optic cable is less expensive overall than a telephone network using copper cable. ████ ██ ███████ ██████ █████ ████████ ████████ █████████████ ██ ███████ ██████████ ███████ ██ █████ ████ ███ ████ ██████████ ███████ ███ ██████ ██ █████ ████ ███ ███████████ █████ ███████████ █████ ███ ██████ ████ ███████ ██████ █████████████ ██ ███████
Fiber-optic telephone cables are more expensive to make than copper cable. Networks using fiber-optic cables are less expensive overall than copper. This is because copper cables require frequent amplification of electrical signals to travel long distances, whereas fiber-optic cables use light pulses that travel farther before requiring amplification.
Savings from switching to fiber-optic cables from copper cables exceeds the greater manufacturing cost.
The above statements, if true, ████ ████████ ███████ █████ ███ ██ ███ ██████████
The material from █████ ███████████ █████ ██ ████████████ ██ ████ █████████ ████ ███ ██████ ████ █████ ██████ █████ ██ █████
This is unsupported because while we know it is more expensive to manufacture fiber-optic cable, we don’t know if this is directly due to the price of materials or some other part of the manufacturing process.
The increase in ███ ██████ ██ █████████████ ██ ███████ ███████ ███████ █████████ ██████ ██ █████████ █████ █████████ ████████ ████ █████ ███ ██████ ██████
This is unsupported because while we know that it is more expensive to send signals long distance with copper, we don’t know that it necessarily puts more strain on the networks.
Fiber-optic cable can █████ ████ ████ ███████ ██████████████ ████ ██████ █████ ████
This is unsupported because we are not told anything about the quantity of signals that each type of cable can carry.
Signals transmitted through ███████████ █████ ██████ ██ ███ ████ █████ ██ ███████ ███████████ ███████ ██████ ██████
This is unsupported because the author only tells us about the cost, not about the speed of transmitting signals on each type of cable.
The cost associated ████ ████████ █████████████ ██ ███████ █████████ ███████ ██████ █████ ███████ ███ █████ █████████████ ████ ██ ███████████ ██████
This is strongly supported because the author states that switching to fiber-optic cables can save money overall despite the greater cost associated with manufacturing fiber optic cables.