Final answer:
Sorting children into gifted and nongifted educational groups can create a self-fulfilling prophecy, increase social isolation, and promote racial segregation and prejudice.
Step-by-step explanation:
The subject of this question is Social Studies, specifically the effects of sorting children into gifted and nongifted educational groups.
Out of the given options, option D) has all of the above effects. Sorting children into gifted and nongifted educational groups can create a self-fulfilling prophecy, increase social isolation between groups, and promote racial segregation and prejudice.
For example, when children are placed in gifted groups, they may receive higher expectations and more opportunities for enrichment, leading them to fulfill those expectations and achieve higher academic success. On the other hand, children placed in nongifted groups may be stigmatized and have limited access to resources and support, which can hinder their progress. This sorting process can also reinforce social divisions and perpetuate racial segregation and prejudice if it is based on biased criteria or stereotypes.