Performance is a method of studying a text

Multiple input channels require:

A. separate faders B. separate preamps C. separate VU meters D. both A & B E. both A & C

Which of the following is not an example of internal noise?

A. someone being unable to concentrate on a movie because they drank a large pop and feel the need to use the restroom B. music playing over someone's headphones during a speech C. falling asleep in class D. body aches and chills from the flu making it hard for someone to follow what their spouse is saying