Solve using Gauss-Jordan elimination.
$x_1 - x_2 + 3x_3 = -0.1$
$-3x_1 + 5x_2 - 4x_3 - x_4 = 2.7$
$2x_1 + 9x_3 - 2x_4 = 2.4$
$4x_1 - 3x_2 + 8x_3 + 6x_4 = -4.4$
Select the correct choice below and fill in the answer box(es) within your choice.
A. The unique solution is $x_1 = \boxed{}$, $x_2 = \boxed{}$, $x_3 = \boxed{}$, and $x_4 = \boxed{}$. (Simplify your answers.)
B. The system has infinitely many solutions. The solution is $x_1 = \boxed{}$, $x_2 = \boxed{}$, $x_3 = \boxed{}$, and $x_4 = t$. (Simplify your answers. Type expressions using t as the variable.)
C. The system has infinitely many solutions. The solution is $x_1 = \boxed{}$, $x_2 = \boxed{}$, $x_3 = s$, and $x_4 = t$. (Simplify your answers. Type expressions using s and t as the variables.)
D. There is no solution.
