Choose the sentence that is written and punctuated correctly.

1. She reported that her boss's secretary called 9-1-1 when she fainted, she has no recollection of the ambulance arriving.

2. She reported that her boss's secretary called 9-1-1 when she fainted; therefore she has no recollection of the ambulance arriving.
Answer:
#2 - flows better - use of therefore
and the semi-colon.

Yes ... plus the fact that #1 is a run-on!!

Correct! Sentence #2 is written and punctuated correctly. The use of a semi-colon after "fainted" helps to separate the two related but independent clauses. Additionally, the word "therefore" indicates a cause-and-effect relationship between the secretary calling 9-1-1 and the speaker not remembering the ambulance arriving. It helps to clarify the logical connection between the two ideas. Good job identifying the correct answer!