Join Date: Jan 2003
Location: Manila, Manila, Philippines.
It's all of the above [^] - "apexing the curve" is a general term for choosing a point at which to flick the bike into the turn, usually the midpoint of the curve. What you were describing in (a) is an "early apex", while (b) is a "late apex."
From a safety standpoint, if the corner is not familiar, it's better to do an early apex which is a more conservative way to approach a turn and will allow you to adjust. A late apex, in my experience anyway, is a faster, more committed way to take a corner.