medium · SAT Reading & Writing

While researching energy-efficient buildings, a student has taken the following notes: - A materials scientist compared two coatings designed to keep rooftops cool. - Standard white roof paint reflects about 80 percent of the sunlight that strikes it. - A newly engineered ultra-white paint reflects about 98 percent of the sunlight that strikes it. - Rooftops coated with the ultra-white paint stayed cooler than the surrounding air. The student wants to emphasize the difference in reflectivity between the two coatings. Which choice most effectively uses relevant information from the notes to accomplish this goal?

1. Standard white paint reflects 80 percent of sunlight, while ultra-white paint reflects 98 percent.
2. Rooftops coated with the newly engineered ultra-white paint stayed cooler than the surrounding air.
3. A materials scientist recently compared two coatings designed to keep the rooftops of buildings cool.
4. The newly engineered ultra-white paint reflects about 98 percent of the sunlight that strikes it.

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