Shuttles and ship's small craft

Here's a question for the group at large:  What do most of you do about
ships' small craft (shuttles, captain's gigs, etc.) when you are
designing
your fleets.

Do you:

A) Assume that small craft are already included in the "Hull"
requirements,
but can have no effect on combat.

B) Assume that ships without mass devoted to hanger bays and the
shuttles
themselves don't have any small craft at all.

C) Require all designs above a certain size or which do not have
stream-lining to include hangar bays and small craft.