Answer:
a. The single line
Step-by-step explanation:
Since in the question it is mentioned that a process is designed of nine minutes in which the decision is taken for using a single machine with eight workers or eight separate individual worker cell should be used. Also the eight individual operator sells performs the same assembly task
Based on the above information,
The single line would generated the high output there is a high chance of variability that results in generating less output as compared with the single line