K.C., who was injured in a motorcycle accident, remembers facts like the difference between a strike and a spare in bowling, but he is unaware of experiencing things like hearing about the circumstances of his brother's death, which occurred two years before the accident. His memory behavior suggests _______________.
a. intact semantic memory but defective episodic memory.
b. intact procedural memory but defective semantic memory.
c. intact episodic memory but defective semantic memory.
d. intact episodic memory but defective procedural memory.