Which line shows the first error in the solution?
6x + 4 = 3x - 8 ( 1 )
6x - 3x + 4x = 3x - 3x - 8 ( 2 )
3x + 4 = -8 ( 3 )
3x + 4 - 4 = -8 - 4 ( 4 )
3x = -4 ( 5 )
3x/3 = -4/3 ( 6 )
x = -4/3 ( 7 )
A. line 3
B. line 4
C. line 5
D. line 6