Which of these is one of the common characters of the art of the Eastern and Western Roman Empires? A. They both used abstraction.
B. They both focused on religion.
C. They both involved bright, vibrant colors.
D. They both relied on mathematical perspective.

D

Explanation:Because the perspective they use and the math they use describes what they want do or how they do their art  

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!