Simplify (7x + 2 + 8x4) – (2x – 5 – 8x4) + (3x + 5x4)
A15x4 + 14x + 7
B21x4 + 8x + 7
C21x4 + 14x + 7
D15x4 + 19x + 7
A15x4 + 14x + 7
B21x4 + 8x + 7
C21x4 + 14x + 7
D15x4 + 19x + 7