Derik Parfit Says That the Six-Year Old You Once Were

Derik Parfit says that the six-year old you once were could be said to be

A) identical to you, since there is physical continuity between your bodies.
B) a totally different person from you, since you have had experiences that the six-year old never had.
C) your ancestor self, from whom you have emerged.
D) merely a moment in a passing flow of experiences in which there are no persons or selves.