Identify the sentence that is correctly punctuated.
A. Clara did not study very much for her biology test, therefore, she guessed at many of the answers.
B. Clara did not study very much for her biology test; therefore she guessed at many of the answers.
C. Clara did not study very much for her biology test; therefore, she guessed at many of the answers.
D. Clara did not study very much for her biology test, therefore; she guessed at many of the answers
C
Not C.
Use a comma after a transitional expression of two or more syllables; therefore, the correct answer is C.
The correctly punctuated sentence is C. "Clara did not study very much for her biology test; therefore, she guessed at many of the answers."
Explanation: In this sentence, two independent clauses are joined by a coordinating conjunction (therefore). The correct punctuation in such cases is to use a semicolon (;) before the coordinating conjunction and a comma (,) after the coordinating conjunction. This punctuation correctly separates the two clauses and makes the sentence clear and grammatically correct. Option C follows this punctuation rule, making it the correctly punctuated sentence.