Fundamental relationship between dry density $$(\gamma d)$$, bulk density $$(\gamma)$$ and water content $$(\omega )$$ is _____.

A

$$ \gamma= \frac{\gamma d}{(1+\omega)} $$

B

$$ \gamma d= \frac{\gamma }{(1+\omega)} $$

C

$$ \omega= \frac{\gamma }{(1+\gamma d)} $$

D

$$ \omega= \frac{\gamma }{(1-\gamma d)} $$