He did not approve of slavery, he just didn't know how to end it
The scientific revolution was the creation of modern science, and scientific study. It occurred during the 1500's and 1600's, and was caused by the Renaissance. The Enlightenment was where every social, political, and economic problem would be solved through the use of reason.
"d. It freed serfs who had been bound to the land for ten years or more" would be the only accurate statement about the Justinian Code since this was a humane law.