$1\mathrm{.}20$ and $1\mathrm{.}25$ are wrong.

Below is a graph of Absorbance $($unitless$,y-$axis$)$ versus Concentration $(M,x-$axis$).$ Determine the value of the slope to three

significant figures.

A$.1\mathrm{.}20{10}^3{M}^{-1}$

B$.1\mathrm{.}33{10}^3{M}^{-1}$

C$.1\mathrm{.}25{10}^{-1}{M}^{-1}$

D$.7\mathrm{.}69{10}^{-4}{M}^{-1}$