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(1 point) Which of the following subsets of {R}^{3x3} are subspaces of {R}^{3x3}? A. The 3x3...

(1 point) Which of the following subsets of {R}^{3x3} are subspaces of {R}^{3x3}?

A. The 3x3 matrices with determinant 0

B. The 3x3 matrices with all zeros in the first row

C. The symmetric 3x3 matrices

D. The 3x3 matrices whose entries are all integers

E. The invertible 3x3 matrices

F. The diagonal 3x3 matrices

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