Listed below are several different astronomical objects. Rank the objects based on the amount that spacetime is curved $($relative to flat spacetime$)$ very near the surface $($or event horizon$)$ of the objects, from greatest to least.

A$.$ A one$-$solar$-$mass red giant with a radius of $100$ times the radius of the Sun

B$.$ A one$-$solar$-$mass white dwarf with a radius of $0\mathrm{.}01$ times the radius of the Sun

C$.$ A one$-$solar$-$mass black hole with a radius of three hundred thousandth of the radius of the Sun

D$.$ The Sun

$($Greatest Amount$)$

$($Least Amount$)$