Two Toddlers Are on a Playground

Multiple Choice

Two toddlers are on a playground. Katie crawls through the pipe tunnel and yells "Look at me!" Sarah crawls through the tunnel, too, and then yells "Look at me!" Katie climbs the slide and shouts "Look at me!" before sliding down. Sarah climbs the slide, yells "Look at me!" and slides down. The girls are engaging in

A) coordinated imitation.
B) symbolic play.
C) social referencing.
D) emotional contagion.