medium · GMAT Verbal

Which of the following, if true, most weakens the developer's conclusion?

1. Conventional ground-based turbines have been manufactured at very large scale for several decades, giving their established suppliers reliably low-cost, high-volume production lines.
2. Wind speeds at the 500-meter altitude where the tethered kites fly tend to vary somewhat from one geographic region to another across the candidate sites under consideration.
3. The kites require continual automated steering and frequent tether replacement, making their operating and maintenance costs per kilowatt-hour far higher than a turbine's.
4. Some local communities have voiced strong objections to the visual appearance of the tall conventional turbines that have been installed near their homes and farmland.
5. The tethered kites occupy noticeably less ground area at their anchor point than a conventional turbine of comparable rated generating capacity would require.

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