A cubical box of side 2 m is to be filled up to the brim with water using a smaller cubical box. The sides of this cubical box are 20 cm long. How many times must the smaller box be used for this purpose?

Question

$\begin {array} {1 1} (A)\;10 & \quad (B)\;100 \\ (C)\;1000 & \quad (D)\;10000 \end {array}$