【单选题】Ever since she started piano lessons at the age of ten, Carol has loved music. As she got older, she decided to become a music teacher. When she went to college, she took singing lessons as part of he...
A.
The characters in operas don't act but sing.
B.
The stories of opera are only about love.
C.
The stories of opera may have either happy ending or sad ending.
D.
The characters in the opera speak to tell the stories.