All around the world, millions of people watch hundreds of new movies a year. Most people are aware that these movies have actors and actresses', directors, stunt doubles, and camera operators. But have you ever wondered how the crack of a bat in a baseball scene sounds so authentic even though the camera must be dozens of feet away? What is the meaning of authentic as it is used in the paragraph 1. Crisp 2. Close 3. Loud 4. Real