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Hi mukherjee.tanuj3,
This CR focuses on a comparison between solar-powered plants and oil-fired plants.
The Facts:
-Solar power is more cost-efficient than it's ever been (due to tech improvements and reduced equipment costs)
-However, the viability of solar power over oil power is unchanged (the price-per-barrel of oil that makes a NEW solar PLANT more economical than a NEW oil PLANT is still $35/barrel).
The Logic:
Solar power is more cost-efficient compared to how it used to be, but "the math" behind choosing a NEW solar PLANT vs. a NEW oil PLANT has NOT changed. Something involving NEW OIL PLANTS has to be the reason (some type of improvement).
Answer C gives us a reason; Answer A does not address the issue in the prompt.
GMAT assassins aren't born, they're made,
Rich
