At the start of middle childhood, children play games:

A) according to preexisting rules.
B) with an understanding that rules are social conventions.
C) with elaborate rules only if they are boys.
D) with little regard for rules.

Social Conventions

Established norms and agreed upon standards of behavior in a society.

Preexisting Rules

Regulations or guidelines that were established before a particular event or situation.

Elaborate Rules

Detailed and sometimes complex guidelines and principles designed to govern behavior or procedural processes.