Which of the following sets are subspaces of R?A. {(-5, y, z) | y, z arbitrary numbers }B. {(x, y, z) | x+y+z= -8}C. {(8x

Which of the following sets are subspaces of R³?A. {(-5, y, z) | y, z arbitrary numbers }B. {(x, y, z) | x+y+z= -8}C. {(8x + 6y, 3x - 9y, -2x +9y) | x, y arbitrary numbers }D. {(x, y, z) | x+y+z=0}E. {(x, y, z) | 5x + 7y= 0,4x + 8z = 0}F. {(x, y, z) | x