The context clue which best helps readers to determine the meaning of the word standard is: B. "rigidly fixed"
A context clue can be defined as hints that provides the meaning of an unfamiliar word, which is literally hidden in plain sight in a literary work such as a paragraph, essay, articles, or passage.
In this context, "rigidly fixed" is a context clue which best helps readers to determine the meaning of the word standard because it is not dynamic but static.
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