Sally has a dog at home so she knows about dogs. She is walking down the street and sees an animal walking toward her. The animal has four legs, fur, a tail, and is barking. Sally knows that these are characteristics of a dog given her knowledge of dogs. She quickly concludes that this animal is a dog. This example illustrated the Piagetian concept of _____.
A) operations
B) assimilation
C) equilibrium
D) accommodation