A Cylindrical Piece of Wood Has a Mass M =

A cylindrical piece of wood has a mass M = 0.235 kg. A small piece of lead with a mass m = 0.021 kg is fixed in the wood at the bottom of the cylinder so that the cylinder floats in water in a stable position, as shown. The radius of the cylinder is 1.65 cm. The depth x of the cylinder below the surface of the water is

A) 0.38 m.
B) 0.57 m.
C) 0.22 m.
D) 0.42 m.
E) 0.30 m.