Rat Ogres and horde formation

While not specifically detailed, these two entries in the Skaven FAQ indicate it should be #3.

Q: The Packmasters’ special rule Running with the Pack and the
special rule Beast Pack seem to contradict each other. How do they
work? (p53)
A: The Packmaster and Master Moulder models are ignored
when working out the unit’s rank bonus, so only ranks of Rat
Ogres count. Use the Packmasters’ or Master Moulders’ Ld
value (or the General’s) as the base Ld for the unit, to which
you then add the Rat Ogres’ rank bonus.

Q: Can a Packmaster use his whip from behind an additional rank of
Giant Rats or Rat Ogres if they are deployed as a horde (10 or 6
models wide respectively)? (p53)
A: No.