Ice crystallizes in a hexagonal lattice. At a certain low temperature, the lattice constants are a = 4.53 $$\mathring{\text{A}}$$ and c = 7.41 $$\mathring{\text{A}}$$. The number of $$\text{H}_2\text{O}$$ molecules contained in a unit cell ($$d \approx 0.92 \text{ g cm}^{-3}$$ at the given temperature) is

A

4

B

8

C

12

D

24