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Question

Difficulty: MediumMeeting Specific Rhetorical Goals

Passage Excerpt:
In 2009, chemist Mas Subramanian and his team at Oregon State University were researching materials for electronics applications. While heating manganese oxide along with other chemicals to high temperatures, they accidentally created a brilliant, durable new pigment: YInMn Blue. Chemists had long sought a blue pigment that was both stable and non-toxic, [X]

The writer wants to emphasize the safety benefits of YInMn Blue by contrasting it with the specific chemical hazards of traditional blue pigments. Given that all the choices are true, which one best accomplishes this goal?

  1. since traditional options like cobalt blue and Prussian blue contained toxic elements such as cobalt and cyanide.Answer
  2. B
    since traditional options like cobalt blue and Prussian blue were very expensive and highly sought after by painters.
  3. C
    since traditional options like cobalt blue and Prussian blue will contain toxic elements such as cobalt and cyanide.
  4. D
    traditional options like cobalt blue and Prussian blue contained toxic elements such as cobalt and cyanide, they were dangerous.

Answer

since traditional options like cobalt blue and Prussian blue contained toxic elements such as cobalt and cyanide.
The correct option, which states that traditional options contained toxic elements such as cobalt and cyanide, is grammatically correct and directly fulfills the writer's goal of highlighting safety benefits by contrasting YInMn Blue with the specific health hazards of older pigments.

Step-by-Step Solution

1
Identify the rhetorical goal specified in the prompt.
The goal is to highlight the safety benefits of the new pigment by referencing the specific chemical hazards of traditional blue pigments.
Recognizing the exact criteria prevents choosing options that are grammatically correct but rhetorically off-topic.
2
Check the options for grammatical correctness.
The option containing 'will contain' creates an illogical shift to future tense, and the option lacking a subordinating conjunction creates a comma splice.
Eliminating grammatically flawed options helps narrow down the choices.
3
Evaluate the remaining grammatically correct options against the rhetorical goal.
The option mentioning high costs does not address safety, whereas the option detailing toxic elements like cobalt and cyanide directly emphasizes the chemical hazards of traditional pigments.
The option that satisfies both grammatical and rhetorical requirements is the correct choice.

Key Concept

Meeting Specific Rhetorical Goals
Estimated Time:1m 0s
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Topics

Meeting Specific Rhetorical Goals

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