The Density of Quartz Is 165 Lb/ft³

The density of quartz is 165 lb/ft³. A clear crystal with a mass of 26.5 g is found to displace 10.0 cm³ of water. The crystal has a density __________

A) of 165 lb/ft³ and therefore is most likely quartz.
B) of 2.65 g/cm³ and therefore is not quartz.
C) of 170 lb/ft³ and might be quartz. Better measurements are needed for a definitive test.
D) of 1.7* 10² lb/ft³. Better measurements are needed for a definitive test.
E) very different from that of quartz.