Final answer:
Sentence 8 in the given question is 'He visited several countries in Europe'. As this sentence is about visiting several countries, it should be pluralized. Hence, the correct answer is to add a comma after visiting to make the sentence read as 'He visited several countries, in Europe', thus the correct option is B.
Explanation:
Sentence 8 in the given question is 'He visited several countries in Europe'. As this sentence is about visiting several countries, it should be pluralized. Hence, the correct answer is to add a comma after visiting to make the sentence read as 'He visited several countries, in Europe'. Adding a semicolon would not make sense in this case as the two clauses of the sentence are not independent of each other. Furthermore, changing countries to country's would not make sense as the sentence does not refer to the possession of a single country. Therefore, option B is the correct answer.
The use of punctuation in sentences plays an important role in conveying the true meaning of the sentence to the readers. Commas are used for a variety of purposes, including separating two different clauses in a sentence. In the given sentence, the two clauses are 'He visited several countries' and 'in Europe'. By adding a comma after visiting, it enables the reader to easily identify the two clauses and understand the intended message of the sentence.
In addition, changing countries to country's would be incorrect as the sentence does not refer to the possession of a single country. By changing it to country's, it would imply that He visited a single country that belongs to someone. Furthermore, adding a semicolon after visiting would be incorrect as the two clauses of the sentence are not independent of each other.
In conclusion, option B is the correct answer. By adding a comma after visiting, it enables the reader to easily identify the two clauses and understand the intended message of the sentence. It also prevents any confusion or misinterpretation of the sentence. Therefore, option B is the most appropriate change to make in sentence 8.