Which of the following best describes how brain imaging has shaped our understanding of speech perception?

A) Neuroimaging has confirmed the theories of the 19^th century without requiring revisions.
B) To date, neuroimaging techniques have not been used to examine the 19^th century theories on speech perception.
C) Neuroimaging has confirmed the general aspects of speech perception models from the 19^th century, though specific details continue to be discovered.
D) Neuroimaging has revealed critical flaws in previous theories of speech perception, resulting in the development of an entirely new model.