Option B seems a lot more pleasant in my opinion -- just imagine trying to clean out the cesspit, or perhaps you forgot to and the castle came under siege and now it's crawling up the fluke to the latrine
We're not even going to talk about the fact that in the illustration of Option A, the person in the latrine doesn't have a way in or out and is actually walled-in stone
This implies that the way in and out is through the cesspit
It is likely that the humiliation of Château Gaillard played a part in the decision of English barons to challenge King John. That in turn led to one of the most important events in English history: the sealing of Magna Carta.[1]
Cesspits were cleaned out by tradesmen known in the UK as gongfermors using shovels and horse-drawn wagons. Cesspools were cleaned only at night, to reduce the smell and annoyance to the public. The typical cesspit was cleaned out once every 8 to 10 years.
Not that they had health codes or even germs theory, it's a really bad idea to use human waste as fertilizer. At least not without proper composting. Again, not really sure they would know that. I presume that any groups that tried it either realized not to do it quickly and wrote rules against it or died off.
Fun observation. Consider how many Jewish rules have a sanitation effect. They might now have completely understood what was happening, but they could see the effects of good food inspection and regular bathing.