Answer:
Sarah's initial understanding of the flute best illustrates the process of A. assimilation.
Explanation:
According to Piaget, assimilation refers to the cognitive process by which an individual tried to understand and relate new information to previously known one. It is a sort of association to previously known information.
In this case, Sarah understands the concept of whistle but does not yet know the flute. She assimilates it as a large whistle since she is relating it to the whistle's blowing function.