Why is decision$-$making required in a programmed work cycle?

Group of answer choices:

A$.$ Since operator interaction is required, the operator enters the decision

B$.$ Different parts or product styles are processed by the system, and the system must decide how to process the current work unit

C$.$ There are variations in the starting work units, and decisions must be made about adjustments in the work cycle to compensate.

b and c only

All of the above