Marie Curie was a pioneering physicist who conducted ground-breaking research on radioactivity. She believed that scientific understanding must replace fear, because knowledge allows humanity to progress.
The writer wants to combine the underlined sentences and incorporate the following quotation: "Nothing in life is to be feared, it is only to be understood."
Which choice most effectively accomplishes this goal?
The field of physics is about understanding, and ("nothing in life is to be feared, it is only to be understood") according to the physicist who conducted research on radioactivity, Marie Curie.
According to Marie Curie, a pioneering physicist who conducted research on radioactivity, humanity progresses through knowledge: "Nothing in life is to be feared, it is only to be understood."
"Nothing in life is to be feared, it is only to be understood," said Marie Curie, a pioneering physicist who conducted research on radioactivity and believed that scientific understanding must replace fear.
A pioneering physicist who believed that knowledge allows humanity to progress, Marie Curie said that "nothing in life is to be feared, it is only to be understood," and she also conducted research on radioactivity.
Correct Answer: C
Choice C is the best answer. It smoothly integrates the quote as the direct object of "said" and uses an appositive phrase ("a pioneering physicist...") to describe Curie, avoiding redundancy.
Choice A is incorrect because the structure is convoluted and the quote is inserted parenthetically in a way that disrupts the meaning. Choice B is incorrect because it attributes the quote to "humanity progresses," which changes the meaning. Choice D is incorrect because the final clause ("and she also conducted...") feels tacked on and lacks cohesion.