A route sheet

A. is an instruction to make a given quantity of a particular item.

B. is a correction or modification of an engineering drawing or bill of materials.

C. shows in schematic form how a product is assembled.

D. lists the operations necessary to produce the component.

D. lists the operations necessary to produce the component.

Explanation:

A route sheet is basically a list of required sequences of operations necessary to accomplish a specific job or the list of operations necessary to produce the component. A route sheet is also functional in tracing such sequences of operations in cases of manufactured components, and it has been relevant since the advent of automatic production control procedures.