[单选题]
A solid object floats in water with thre 0e*l 6lsokww mib8)7ve-fourths o f/za9ad. rkz,f its volume beneath the surface.9d,za azkr. /f What is the object's density?
A. $1333 \; kg/m^{3}$
B. $1000 \; kg/m^{3}$
C. $750 \; kg/m^{3}$
D. $250 \; kg/m^{3}$
