I understand C is incorrect due to the extreme wording of 'excellent' under a low correlation of 38%.
1. If the question were changed to +0.5 (50%) would that make C correct? or still A.
2. If the question were changed to -0.38 (negative correlation), I am assuming A would still be correct?
In that case, "g" may not exist at all! There could be a common factor that makes you perform well on one test but poorly on another but it's more likely that there's a zero-sum game between verbal and spatial intelligence. That is, you can only improve one at the expense of the other!