You might want to add more descriptions of the subject you are researching, or use quotes from articles to help it be known that it is genuine research. Make sure to cite the article and use in-text citation to avoid plagiarism.
Answer:
where is the text of the opinion piece?
Explanation:
The <em>older violins</em> are more than one object, in this case its cannot be used, only their; <em>each violinist</em> could mean male or female, so it would be possible the use of his or her or their (applied for either),but there is only the latter option. The correct answer is their/their.
<em>The older violins no longer had their original parts, but each violinist played their instrument well.</em>
The answer is “who” referring to one person
