Discussion
Which condition must be met before an open circuit voltage reading is meaningful?
Answer: D
Surface charge left after charging reads high, so the battery is rested or briefly loaded before measuring. Applying a load momentarily is genuinely how surface charge is removed, which makes the last option a real technique rather than an error. Most errors here come from carrying across a result from a neighbouring case where it does not hold. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Working one numerical case through both cases side by side fixes the distinction better than any rule of thumb.
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