Overdubbing is recording an additional part onto an existing recording

Which of the following was invented in 1758 for use in Japanese Bunraku puppet theatre?

a. gobo b. footlight c. revolve d. unit set

In the song "Ojos" by Ruben Blades, the usual trumpets of a salsa band are replaced by

A. violins. B. trombones. C. saxophones. D. flutes.