Determine Whether the Matrix Is in Row-Echelon Form, Reduced Row-Echelon $$\left[ \begin{array} { c c c c } 1 & 0 & 0 & 3 \\0 & 1 & 0 & 3 \\0 & 0 & 1 & 10\end{array} \right]$$

Multiple Choice

Determine whether the matrix is in row-echelon form, reduced row-echelon form or neither. $$\left[ \begin{array} { c c c c } 1 & 0 & 0 & 3 \\0 & 1 & 0 & 3 \\0 & 0 & 1 & 10\end{array} \right]$$

A) row-echelon form
B) reduced row-echelon form
C) neither