You are working closely with an experienced associate. he insists on completing a task a certain way but you know there is a more efficient method.what would you be most and least likely to do ?

What you should be least likely to do would be the option: "Your co-worker method works just fine, avoid upsetting him and complete the tasks using his method."
This is the most preferred option because remember, we are told "you know there is a more efficient method", so saying nothing about your method should not be the best option.
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