Discussion
A pass fail decision based on a single Delta E value can be misleading because
Answer: D
Correct answer: a large difference in one component may be masked by the total
The total combines the three components in quadrature, so a batch that is well off in hue but close in lightness and chroma can return a modest total and pass. Since hue is the least tolerated component, that is exactly the failure most likely to be objected to. Component tolerances alongside the total are what prevent it.
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