Which Is an Example of Associative Play

Which is an example of associative play?

A) Two children playing in house,one playing the role of the dad and the other playing the role of the mom
B) Two children playing in a sand box,one building a wall and the other digging a hole
C) Two children playing with sports-associated items,one with a football and the other with a bat
D) Two children playing with a coloring book,one coloring pictures and the other looking at pictures