One major difference between opera buffa and opera seria is: A. Opera seria is meant to be staged in sections, while opera buffa is meant to be watched all at once.
B. Opera buffa has comic elements, while opera seria is strictly dramatic
C. Opera buffa makes fun of the middle class, while opera seria makes fun of the upper class.
D. Opera seria was a form of 19th century opera, while opera buffa was a form of 18th century opera