While Research Has Demonstrated That Infants Understand Many Complex Concepts

While research has demonstrated that infants understand many complex concepts, infants have NOT been shown to demonstrate knowledge concerning

A) the ability to add and subtract small numbers.
B) that objects roll down slopes rather than up slopes.
C) that objects which are less dense will float, while more dense objects will sink.
D) that objects cannot pass through an opening that is smaller than the object.