Toddlers' Willingness to Imitate Modeled Responses

Toddlers' willingness to imitate modeled responses

A) is greater if the model's intentions are clear rather than ambiguous
B) if the model was successful rather than unsuccessful at achieving his aim
C) if they have previously failed themselves to accomplish the goal that the model achieves through his or her actions
D) is greater if the model's intentions are clear rather than ambiguous and if the model was successful rather than unsuccessful at achieving his aim
E) all of these