Choose the sentence that uses coordinating conjunctions correctly without a comma splice or run-on.

Answer and explanation

Correct answer: B. The experiment yielded unexpected results, yet the researchers remained optimistic.

  1. Step 1: When connecting two independent clauses with a coordinating conjunction (FANBOYS: for, and, nor, but, or, yet, so), a comma must precede the conjunction.
  2. Step 2: Here, 'The experiment yielded unexpected results' and 'the researchers remained optimistic' are correctly joined by ', yet'.
Answer
The experiment yielded unexpected results, yet the researchers remained optimistic.
Why not the others: The sentence with no comma before 'yet' omits the required comma; the sentence 'results, researchers remained optimistic' is a comma splice lacking a conjunction; the sentence 'results; but researchers remained optimistic' uses both a semicolon and coordinating conjunction 'but' redundantly.

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