What is the difference between customer$-$facing processes and business$-$facing processes?

Multiple Choice

Business$-$facing processes are front$-$office processes; customer$-$facing processes are back$-$office processes.

Customer$-$facing processes are front$-$office processes; business$-$facing processes are back$-$office processes.

Customer$-$facing processes are back$-$office processes; industry$-$specific customer$-$facing processes are back$-$office processes.

Customer$-$facing processes are back$-$office processes; industry$-$specific customer$-$facing processes are front$-$office processes.