One Important Discovery of Fritsch and Hitzig Was

One important discovery of Fritsch and Hitzig was:

A) they found that when a certain area of the cortex was stimulated,muscular movements were elicited from the opposite side of the body
B) they used electrical stimulation to produce a more articulated map of the motor cortex
C) they mapped cortical regions to the senses
D) they performed autopsies on humans to determine the cause of a behavioral deficit