Which One of the Following Best Illustrates Guided Participation as Developmental

Which one of the following best illustrates guided participation as developmental theorists use the term?

A) The father of 18-month-old twins speaks to them in short sentences with simple words, and he responds enthusiastically when they say "papa" or "doggie."
B) As a way of modeling good form, a high school volleyball coach temporarily becomes a player on the court while the junior varsity team practices after school.
C) A middle school physical education teacher gently guides a student's body as she performs a backward roll for the first time.
D) A preschool teacher asks children to help her frost cupcakes for a parent open house and gives them pointers about how much best to apply the frosting.