Suggested Answer
It's D because 'quietly' has 2 target words, such as 'sitting' and 'reading'. Wrongly positioned right after 'sitting ' confuses the reader. This misplacing can be corrected by moving it at the end of the sentence.
It's D because 'quietly' has 2 target words, such as 'sitting' and 'reading'. Wrongly positioned right after 'sitting ' confuses the reader. This misplacing can be corrected by moving it at the end of the sentence.