Which of the following subsets of R3X3 are subspaces of R³×³? A. The invertible 3 x 3 matrices B. The 3 x 3 matrices with trace 0 (the trace of a matrix is the sum of its diagonal entries) C. The 3 x 3 matrices of determinant 2 D. The 3 x 3 matrices A such that A 4 0-0 7 E. The non-invertible 3 x 3 matrices F. The diagonal 3 x 3 matrices

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