They <span>both have a mood of fatalism and melancholy, and both mention death, and jazz. Both are realistic and pessimistic.</span>
Answer:
The first sentence. It has a very formal tone.
The correct answer is - Sara suddenly became very ill; therefore, she went to see her doctor.
A semicolon is used to separate two sentences, two separate but also connected thoughts. It should come naturally as a pause within a sentence, which is why the first three options are incorrect as they break up the sentence in grammatically incorrect locations.
