[单项选择]

For the second consecutive summer, the community center will be offering American sign language and performing arts. The series of classes, seminars and workshops are designed to develop special skills needed to use American sign language on the stage. Beginning and advanced students will learn acting and main techniques. The course last four weeks, credit is awarded by the state college upon completion of program. Classes are also offered for deaf children and adults. For more information on this program, please call 5553080.

What’s the main topic of the course （　）
A. How to teach arts and crafts to children and adults.
B. How to perform in front of a large audience.
C. How to use sign language in the theater.