Determine if the matrix below is invertible. Use as few calculations as possible. Justify your answer [9 3 -15 -5] Choose the correct answer below O A. The matrix is not invertible because its determinant is zero. O B. The matrix is invertible because its determinant is not zero O C. The matrix is not invertible because the matrix has 2 pivot positions. O D. The matrix is invertible because its columns are multiples of each other. The columns of the matrix form a linearly dependent set.