Elias and Berk Examined Preschool Children's Engagement in Play and Self-Regulatory

Elias and Berk examined preschool children's engagement in play and self-regulatory behaviors over the course of several months. Which of the following results BEST describes their findings?

A) Play and self-regulation were shown to be separate and unrelated processes.
B) Play and self-regulation were positively correlated throughout the study.
C) Play and self-regulation were negatively correlated throughout the study.
D) Children who engaged in more play in the beginning of the study, showed higher levels of self-regulation by the end of the study.