$8)^^$ Two$-$dimensional motion: An object has a position given by r $=[2\mathrm{.}0$ m $+(3\mathrm{.}00$ m$/$s$)$t$]$i $+[3\mathrm{.}0$ m $-(2\mathrm{.}00$ m$/$s$2)$t$2]$j$,$ where all quantities are in SI units. What is the magnitude of the acceleration of the object at time t $=2\mathrm{.}00$ s$?8)$ A$)4\mathrm{.}00$ m$/$s$2$ B$)0\mathrm{.}522$ m$/$s$2$ C$)2\mathrm{.}00$ m$/$s$2$ D$)1\mathrm{.}00$ m$/$s$2$ E$)0\mathrm{.}00$ m$/$s$2$