Patients Who Have Epilepsy Often Experience a Decreased Seizure Frequency

Patients who have epilepsy often experience a decreased seizure frequency after a split-brain procedure.But these patients have also provided evidence for scientists.Specifically,

A) this procedure has led to the well-supported notion that someone can be "left-brained" or "right-brained."
B) research with these patients suggests that there is not significant localization of function in the brain.
C) research with these patients suggests that someone cannot live without an intact corpus callosum,indicating its importance in survival and functioning.
D) research with these patients has provided evidence for some degree of localization of function of the right and left hemispheres.