A solid sphere of radius R made of a material of bulk modulus K is surrounded by a liquid in a cylindrical container. A massless pistion of area A floats on the surface of the liquid. When a mass M is placed on the piston to compress the liquid the fractional change in the radius of the sphere, `deltaR//R`, is .............
A. `(Mg)/(kA)`
B. `(Mg)/(3kA)`
C. `(Mg)/(2kA)`
D. `(Mg)/(4kA)`