Alan Runs into a Former Client at a Social Gathering

Alan runs into a former client at a social gathering and they are quickly attracted to one another. According to ACA guidelines, the relationship can be continued on a more intimate level (with proper forethought) :

A) five years after the counselor-­‐counselee relationship ends.
B) two years after the counselor-­‐counselee relationship ends.
C) ten years after the counselor-­‐counselee relationship ends.
D) never-once a client, always a client.