以下关于迁移的理解，错误的是（）。

A.从平行四边形有关内容的掌握影响菱形的学习，属于自上而下的垂直迁移

B.在同化性迁移中，原有认知结构在迁移中不发生实质性改变，只得到某种充实

C.处于同一概括水平的经验之间的相互影响是垂直迁移

D.定势对迁移的影响表现为促进和阻碍

The nurse should anticipate which psychological reactions during the second trimester of pregnancy（）

A. Self-centeredness and concentration on the behavior and appearance of children.

B. Extroversion and emotional lability.

C. Ambivalence and uncertainty.

D. Dismay over body image and readiness for the end of pregnancy.