Answer:
A) adding more workers exhausts the possible gains from specialization.
Step-by-step explanation:
When a worker specializes in a certain task, they will become more productive and efficient in performing the task. Worker specialization takes a long time, so it only applies in the long run.
In the short run when a company wants to increase its output, it cannot rely on worker specialization since they don't have the time to wait, they must hire more workers.