The Conclusion to Be Drawn from the Man Named Shereshevskii

The conclusion to be drawn from the man named Shereshevskii whose abnormal brain functioning gave him virtually limitless word-for-word memory is that having memory like a video recorder

A) is largely a blessing because no event would be erased.
B) is an advantage because it eliminates "selective" recording (remembering some events and forgetting others) , which provides no useful service to humans.
C) helped him draw powerful inferences and intelligent conclusions from his vast knowledge base.
D) can seriously disrupt functioning in one's personal life