The correct options are
A The bricks on the floor and the walls of the bath were loosely fitted.
B There was no drainage system in place to rid the bath of dirty water.
The Great Bath was an architectural feat from the time. The walls and the floor were made of bricks finely fitted together, with bitumen used to ensure its waterproof characteristic. Built in the citadel, it had a well and a hole in the corner that served the purpose of draining out the dirty water.