SAT Question e2eb70b9: Answer & Explanation

While researching a topic, a student has taken the following notes:

• Traditionally, manufacturers have dyed denim jeans blue by dipping them in a solution containing indigo powder.
• Indigo doesn’t dissolve in just water, so manufacturers must mix hazardous chemicals with water to dissolve the powder.
• Textile researcher Smriti Rai discovered a process for dyeing blue jeans without chemicals.
• Rai added indigo powder to a hydrogel containing nanocellulose and produced a dye that could be spread directly onto the denim.
• Nanocellulose is a natural, plant-based substance that separates the molecules of indigo powder.

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Difficulty:Medium

The student wants to emphasize a difference between the two approaches to dyeing blue jeans. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Though created using a different process, Rai’s dye contains the same ingredient as the dye produced by blue jean manufacturers.

Nanocellulose is a natural, plant-based substance that separates the molecules of indigo powder, which doesn’t dissolve in water.

The traditional approach to dyeing blue jeans is to dip them in a solution containing hazardous chemicals.

Rai’s approach substitutes a natural, plant-based substance for the hazardous chemicals that manufacturers have traditionally used.

SAT Question e2eb70b9: Rhetorical Synthesis answer and explanation

Explanation

Why the other choices are wrong