Jordan measures a$$cube and finds that each side $($length$,$ width, height$)$ of the cube is $3$cm$.$ She then uses a scale and finds the$$mass of the block is $243$g$.$ What is the density of the block? Of what substance is the block made?

Select the correct answer below:

The density is about $1\mathrm{.}0$gcm$3,$ and the block is oak $($wood$).$

The density is about $10\mathrm{.}0$gcm$3,$ and the block is silver.

The density is $9\mathrm{.}0$gcm$3,$ and the block is copper.

The density is about $9\mathrm{.}0$gcm$3,$ and the block is iron.