If A is a 4x3 matrix, then the transformation x = Ax maps ℝ³ onto ℝ⁴. Choose the correct answer below a. True. The columns of A span ℝ⁴ b. False. The columns of A are not linearly independent
c. True. The the columns Of A are linearly independent d. False. The columns of A do not span ℝ⁴