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A test developer wants most items to avoid being either excessively easy or excessively difficult. Which difficulty range is identified as generally desirable?

A. 0–20%
B. 20–30%
C. 30–70%
D. 70–100%
Correct Answer: C. 30–70%

Items with difficulty between 30% and 70% are generally considered desirable, neither too easy nor too hard.

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