|Question 23Verbal

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While researching a topic, a student has taken the following notes:
• Scientists have long sought to determine the origin of glass in Chile's Atacama Desert.
• A 2017 study concluded that ancient grass fires had melted the area's sandy soil into glass.
• In 2021, a different study revealed that the mineral signatures of glass samples were consistent with the mineral signatures of comet samples collected by NASA.
• That study concluded that the glass had formed as a result of a cometary explosion close to the desert's surface.
The student wants to describe how scientific understanding about the glass's origin has evolved. Which choice most effectively uses relevant information from the notes to accomplish this goal?
Studies in 2017 and 2021 offered different explanations for the origin of the glass.
A
A 2017 study concluded that ancient grass fires had caused the glass's formation, but new research suggests that the glass formed as a result of a cometary explosion close to the desert's surface.
B
Mineral signatures of glass samples are consistent with those of comet samples collected by NASA, according to new research.
C
Scientists have long sought to determine the origin of the glass, with one study concluding that it formed when ancient grass fires melted the area's sandy soil.
D