Find a general solution $of$ the linear system below.

$x^{\text{'}\text{'}}-3x^{\text{'}}-2x+y^{\text{'}\text{'}}-y^{\text{'}}+2y=0,2x^{\text{'}\text{'}}-9x^{\text{'}}-4x+3y^{\text{'}\text{'}}-2y^{\text{'}}+6y=0$

Find the solution $of$ the system below. Starting with $x(t).$ Choose the correct answer below.

$A.x(t)=c_{1}cost+c_{2}s{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}+c_3{e}^{-2t}+c_4{e}^{2t}$

$B.x(t)=c_1{e}^{-t}+c_2{e}^t+c_{3}cos-2t+c_{4}cos2t$

$C.x(t)=c_1{e}^{-t}+c_2{e}^t+c_3{e}^{-2t}+c_4{e}^{2t}$

$D.x(t)=c_{1}cost+c_{2}sint+c_{3}cos2t+c_{4}sin2t$