From the paragraph:
Nexcom did not adopt AI due to concerns over response accuracy and their customer satisfaction stayed stable.
Other companies using AI reported decline in satisfaction of casual users.
Because of this Nexcom says humans are better than AI.
Options:
A. Mixed sentiment does not explain decline in satisfaction and does not challenge the idea that humans are better. Hence no.
B. It is not AI's fault that customer is not able to use it. AI may be better for those understanding it. Hence no.
C. It supports the conclusion rather than weakening it. Hence no.
D. Possible future benefits of AI does not mean it is better or worse. Hence no.
E. If the staff was untrained for AI, it would not have been of good help to the customer. Explains the drop in satisfaction. Best choice.
Answer Option E