Wilma Is Upset Because She Is Convinced That Her Brother

Multiple Choice

Wilma is upset because she is convinced that her brother has a bigger cookie than she does.Her dad quickly breaks Wilma's cookie in two and tells her that she now has "more" cookie.If Wilma calms down and is convinced that she does have more cookie, it would suggest that Wilma:

A) has not yet mastered object permanence
B) understands object permanence
C) does not yet understand conservation
D) has mastered the concept of conservation