I think that (A) is true because of Spearman's g. The evidence for g is overwhelming.
Did you just claim that g correlates well enough with two specific s to measure one s (ability to determine the answer expected by the writer of a test) and provide results for a different one (literacy) in the general sense?
Because my position is that most standardized tests measure a combination of the intended subject and the ability of the taker to figure out the test writer; part of this comes from my observed ability to consistently outperform people with an equal or better knowledge of the subject being tested on many different tests, and most of it...
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