Rina Rina 13-06-2024 Mathematics High School Simplify:(7x + 2 + 8x^4) – (2x – 5 – 8x^4) + (3x + 5x^4)A. 15x^4 + 19x + 7 B. 21x^4 + 8x + 7 C. 21x^4 + 14x + 7 D. 15x^4 + 14x + 7