Comprehension : Read the following extract of a conversation and choose the correct answer?

Comprehension : Read the following extract of a conversation and choose the correct answer. Christian : The actors stand in front of a green background and the set designer, with pictures, makes the set look like a restaurant, a street, a bank. Sam : And, who defines where and what to film? Christian : Well, the director, he is in charge of the whole product. Lauren : What about the audio? Christian : There is a sound designer in the control room, and he is also responsible for the microphones. What does the set designer do. Seleccione una : (respuesta) O a. Works with pictures for the set O b. Works in front of the green background​.