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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. ████ ██ ███████ ██████ █████ ████████ ████████ █████████████ ██ ███████ ██████████ ███████ ██ █████ ████ ███ ████ ██████████ ███████ ███ ██████ ██ █████ ████ ███ ███████████ █████ ███████████ █████ ███ ██████ ████ ███████ ██████ █████████████ ██ ███████
Summary
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.
Strongly Supported Conclusions
Savings from switching to fiber-optic cables from copper cables exceeds the greater manufacturing cost.
1.
The above statements, if true, ████ ████████ ███████ █████ ███ ██ ███ ██████████
a
The material from █████ ███████████ █████ ██ ████████████ ██ ████ █████████ ████ ███ ██████ ████ █████ ██████ █████ ██ █████
b
The increase in ███ ██████ ██ █████████████ ██ ███████ ███████ ███████ █████████ ██████ ██ █████████ █████ █████████ ████████ ████ █████ ███ ██████ ██████
c
Fiber-optic cable can █████ ████ ████ ███████ ██████████████ ████ ██████ █████ ████
d
Signals transmitted through ███████████ █████ ██████ ██ ███ ████ █████ ██ ███████ ███████████ ███████ ██████ ██████
e
The cost associated ████ ████████ █████████████ ██ ███████ █████████ ███████ ██████ █████ ███████ ███ █████ █████████████ ████ ██ ███████████ ██████