How Do the Case Studies Known by the Initials A K.C

How do the case studies known by the initials A.J.and K.C.?

A) A.J.remembers autobiographical experiences in detail whereas K.C.has no such recollections.
B) A.J.suffers from anterograde amnesia whereas K.C.has retrograde amnesia
C) A.J.suffers from retrograde amnesia whereas K.C.has anterograde amnesia
D) A.J.has exceptional skill memory whereas K.C.has exceptional autobiographical memory.