What is opera seria?

a. The genre that resulted from a combination of French and Italian operatictraditions; it combined Italian lyricism with the French delight in intensedramatic expression

b. Heroic, fully sung Italian opera that dominated the stage at the courts ofEurope during the eighteenth century.
c. Genre of opera based folk tales that contain a mysterious or supernaturaltheme.
d. Genre of opera with spoken dialogue and traditional arias.

b