12. For the sake of, the logic and coherence of this paragraph, Sentence 4 should be placed:

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

S2: After her husband died, she continued to manage the operations of both, S3: took business management classes, took a third of the water company, S4: managed the company with the help of her children until her death. According to the chronological order, the position of S4 is unchanged, and the position of F is correct.