The statement that grit and perseverance are better predictors of academic success than IQ alone is the most accurate representation of the relationship between IQ and achievement. The correct answer is c.
This suggests that while IQ can be a predictor of success in various fields, it is the combination of personal characteristics such as determination and tenacity that play a larger role in achieving success.
The options provided in the original question point to various misconceptions about IQ, such as its sole relationship with success in various domains or its dependence on visual-spatial intelligence, which are not supported by the broader research on the topic.
The correct answer is c.