Under the "Substantial Capacity" Test, the "Cognitive" Part of the Rule

Under the "substantial capacity" test, the "cognitive" part of the rule is satisfied: ​

A) only if the defendant knew what he had done.
B) even if the defendant knew what he had done, but lacked the substantial capacity to appreciate that what he had done was wrong.
C) if the defendant knew what he had done, and could appreciate that what he had done was wrong.
D) only if the defendant did not know what he had done.