easy · GMAT Verbal
A utility's new sodium-glass batteries store the same total energy as its lithium ones but occupy three times the floor area. The utility installs the sodium-glass units only at its rural substations, where land is cheap and plentiful, and keeps lithium at its urban substations.
Which of the following is most strongly supported by the statements above?
- Sodium-glass batteries are cheaper per unit of energy than lithium batteries.
- At least one factor in the utility's choice between the two battery types varies by substation location.
- The utility plans to phase out lithium batteries entirely within a few years.
- Sodium-glass batteries cannot store as much total energy as lithium batteries.
- Urban substations have no room to install any additional batteries of either type.
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