Passage: Data from ten urban school districts shows that districts spending more than $12,000 per pupil annually had graduation rates averaging 89%, while districts spending less averaged 74%. Which conclusion is best supported?
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A
Higher per-pupil spending is associated with higher graduation rates in these districts.
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B
Money is the only factor that determines whether students graduate.
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C
Districts spending less are deliberately trying to lower graduation rates.
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D
Graduation rates will reach 100% if spending is increased sufficiently.