8. Suppose that A is a n xm matrix B is a p xq matrix, C is a r x s. Assume that the matrix B2A + BCT is well defined. Which of the following is true? A) n = m =p=q=r=s. B) n = m = p = s and q = r. (C) p = q = n = s and m = r D) q = p = m = r = s. E) None of the above.

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