DeLoache, Uttal, and Rosengren (2004) Observed That Children Younger Than

DeLoache, Uttal, and Rosengren (2004) observed that children younger than about 2 years often commit errors, such as trying to put on a doll's shoe or trying to get into a toy car. They speculated that these errors were caused by

A) immaturity of motor programs.
B) immaturity of size perception.
C) immaturity of distance perception.
D) all of these