A Large Tub Is Half Full of Water

A large tub is half full of water. A mass M = 25.0 kg, which has a specific gravity of 2.5, is attached to the right-hand side of the tub, out of the water. The entire apparatus balances perfectly horizontally on a fulcrum at F, as in a) . The tub is clamped in place and M is lowered to the bottom, completely submerged, as in b) . When the clamps are removed, the tub

A) remains balanced.
B) tips, with point L going down.
C) tips, with point L going up.
D) starts oscillating.
E) behavior depends on mass and volume of mass M.