38 What theory does the Ashcraft and Kirk study challenge?
(A)Math anxiety improves math performance.
(B)Math anxiety is a result of low math aptitude.
(C)Starting to study math at a young age improves math performance.
(D)The more math aptitude one has, the less working memory is needed.

至十二歲時，原本就感覺被數學這科目所威脅...