The research regarding children in daycare is complex and varies based on many factors such as the quality of the daycare, the age of the children, and individual family circumstances. However, based on a general understanding of research findings, the most accurate statement among the options provided is:
b. show better academic performance in elementary school than children who do not attend day care.
Studies have indicated that high-quality daycare can have positive effects on children's academic readiness and social skills. It is important to note that quality and type of daycare play a significant role in these outcomes.