While researching a topic, a student has taken the following notes: Platinum is a rare and expensive metal. It is

Question

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

Platinum is a rare and expensive metal.
It is used as a alyst for chemical reactions.
Platinum alysts typically require a large amount of platinum to be effective.
Researcher Jianbo Tang and his colleagues created a platinum alyst that combines platinum with liquid gallium.
Their alyst was highly effective and required only trace amounts of platinum (0.0001% of the atoms in the mixture).

The student wants to explain an advantage of the new platinum alyst developed by Jianbo Tang and his colleagues. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Accepted Answer

Choice D is the best answer. The sentence explains an advantage of Tang and his colleagues’ platinum alyst, noting that it requires far less platinum (which is rare and expensive) than other platinum alysts do.

Choice A is incorrect. The sentence describes the platinum alyst that Tang and his colleagues created; it doesn’t explain an advantage of their platinum alyst. Choice B is incorrect. The sentence emphasizes a similarity between the new platinum alyst and other platinum alysts; it doesn’t explain an advantage of the new platinum alyst. Choice C is incorrect. The sentence connects the metal platinum to the functioning of platinum alysts, noting that large amounts of platinum are typically required for platinum alysts to be effective; it doesn’t explain an advantage of Tang and his colleagues’ platinum alyst.

Question while-

While researching a topic, a student has taken the following notes: Platinum is a rare and

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