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.
Statements
pivot / math-y (although, >, <)
MANUFACTURING Fiber-optic > copper $
OVERALL COST OF NETWORK Fiber-optic < copper $
causal (this is because)
Fiber optic is cheaper than copper, to run your network on, because cooper requires frequent amplification, whereas fiber optic can go for a while without needing amplification.
Evaluate
We can tell from the mathematical comparison in the first sentence that other aspects of running a fiber-optic network outweigh the extra cost you pay to manufacture the fiber-optic cable, since a fiber-optic network is cheaper overall than a copper network. Then the second sentence tells us,
When we see Causal Connector Language like , there is a very strong likelihood that the correct answer wants to test us on whether we understand this causal connection.
The order of these statements is "Effect. This is because Cause". So we want to restate this relationship in our more intuitive ordering of Cause leads to Effect.
The fact that copper requires frequent amplification leads to copper being a more expensive cable to run a network off of, despite the fact that copper is cheaper to manufacture than is fiber optic cable.
Goal
Let's look for a safely worded answer that potentially reinforces this idea that