There are no answer choices, but I hope that this helps.
Explanation:
He uses music to inspire and educate others, and he also uses it as his political platform. He uses the literature from the world around him that deals with social issues and injustice; he uses literature to express hope for a society that is fair and just. He knew there was a lack of diversity in music, especially in orchestras - not just by color, but by gender also. It is also important to note that he introduced his Jewish beliefs and Jewish themes and wanted to make sure that his own people knew and understood that he was using the Bible and other scripture based items to share his faith.
I think the correct answer from the choices listed above is the second option. All of the following are possible sources of error in a scientific investigation except for completing multiple trials during an experiment. Completing multiple trials will instead help you minimize errors in the experiment.