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 her studies. Her voice teacher discovered that nineteen-year-old Carol had an exceptionally beautiful soprano (女高音) voice -- the highest singing voice for women.

Carol decided to make opera her goal, not only because she loved to sing but also because she loved the drama. Opera(歌剧) is a play in which the characters sing the words instead of speaking them. The stories of opera can be tragic (悲剧的)or comical(喜剧的). They can be personal stories about two people falling in love or grand stories about kings and queens who lived long ago. As the characters in an opera sing, the feelings expressed by words and music come to life.

Today, Carol performs throughout the United States and Europe as she has done for almost twenty years. But she has never forgotten why she started singing in the first place.

"Put your heart into your singing and enjoy it," says Carol," because singing is a great joy. That's why I sing. In fact, that's why everybody sings."

What's about operas according to the second paragraph？

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.