Most of Our Knowledge About the Physiology of Language Has

Most of our knowledge about the physiology of language has been obtained by studying

A) the verbal behavior of non-human primates.
B) changes in blood flow to language areas in intact, normal people while they are talking.
C) language function in people who have suffered cerebrovascular accidents or strokes.
D) behavioral patterns in patients with brain tumors.
E) changes in verbal behavior after consumption of drugs such as alcohol or cocaine.