Answer: D) They had not seen the experiment, yet they knew the results.
Explanation: a conjunction is a an uninflected linguistic form used to connect clauses, phrases, words or sentences or to coordinate words in the same clause, for example: and, if, so, yet, but, or, nor, etc. In the given sentence we can see an example of a conjunction in the word "yet" it is joining two independent clauses: "they had not seen the experiment" and "they knew the results."
A) The medical information
Since 1913, the medical knowledge has vastly changed. Medical terms that are today common-knowledge (DNA, chemotherapy, etc.) were not even in existence in 1913.
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