In assembly line balancing, the theoretical minimum number of workstations is

A) the ratio of the sum of all task times to cycle time.
B) always (when a fraction) rounded upward to the next larger integer value.
C) not always possible to reach when tasks are actually assigned to stations.
D) all of the above.
E) none of the above.

The theoretical minimum number of workstations in assembly line balancing is calculated by dividing the sum of all task times by the cycle time (A), and this value is always rounded up to the nearest whole number because you can't have a fraction of a workstation (B). However, due to constraints such as task ordering or other operational constraints, it might not always be possible to achieve this theoretical minimum when assigning tasks to stations (C). Therefore, all of the statements A, B, and C are correct, making D the correct answer.