Was the Thinking of Dylann Roof, the Charleston Mass Murderer

Was the thinking of Dylann Roof, the Charleston mass murderer, delusional?

A) We may never know because he refused to allow evidence of his mental health status to be used during his capital murder trial.
B) Yes, as he opted to represent himself without a lawyer in the penalty phase, thus reflecting his highly delusional state of mind.
C) We may never know because his high IQ was compromised by a significant discrepancy between his ability to comprehend and to process information.
D) No, as he presented coherent and logical arguments for preventing any public examination of his mental state or background.