The answer is D. The repetition of such phrases could be decoded to reveal hidden messages.
Using more than one medium of expression or communication is considered A) Multimedia.
mul·ti·me·di·a
/ˌməltēˈmēdēə,ˌməltīˈmēdēə/
adjective
1.
(of art, education, etc.) using more than one medium of expression or communication.
"a multimedia art form"
Back away very slowly, and don't run
Short answer B
Argument
It isn't C either. Any number of reasons could be the cause of a book that size. Taking care of the building alone would result in a huge number of pages that don't really concern anyone but the owner and the person responsible for taking care of the building. Tax deductions would be another problem and so would overtime and reporting methods.
Assembly lines methods have nothing to do with lights that offer options to the basic model of anything being made assembled or manufactured. Not in the way fast foods would use the term.
The answer is B. The object is to get the hamburgers cooked. Knowing that the process takes 90 seconds and they start frozen, go onto a conveyor belt and come out cooked is so typical of assembly line methods.