The Density of Quartz Is 165 Lb/ft³

The density of quartz is 165 lb/ft³.A clear crysta of unknown composition with a mass of 26.5 g is found to displace 10.0 cm³ of water.The crystal has a density _______ (1 lb = 453.6 g; 1 m³ = 1 *106 cm³ = 35.31 ft³.)

A) of 165 lb/ft³ and therefore could be quartz.
B) of 2.65 g/cm³ and therefore cannot be quartz.
C) of 170 lb/ft³ and might be quartz.Better measurements are needed for a definitive test.
D) of 4.24 g/cm³.Better measurements are needed for a definitive test.
E) very different from that of quartz.