A production environment where pre$-$assembled components, subassemblies, and

modules are put together in response to a specific customer order is$?$

A$)$ Engineer$-$to$-$order

B$)$ Make$-$to$-$order

C$)$ Assemble$-$to$-$order

D$)$ Make$-$to$-$stock

E$)$ Custom order