Final answer:
Preliminary performances are open to attendees.
Step-by-step explanation:
The statement “Preliminary performances are open to attendees” is true. Preliminary performances, also known as previews, are open to the public. They are held before the official opening night of a theatrical production and allow the actors and production team to make any necessary adjustments based on audience reactions. These performances are an important part of the creative process in the theater and provide valuable feedback for the cast and crew.