Where Would You Place the Actual Extinction Date of a Taxon

Multiple Choice

Where would you place the actual extinction date of a taxon if you knew that the Signor-Lipps effect was at work?

A) Exactly at the date of the last known fossil
B) Before the date of the last known fossil
C) After the date of the last known fossil
D) It is not possible to determine when extinction occurred relative to the date of the last known fossil.