1 . 4a-8b2-3a-9b3-3a+b4a+8b3a-9b

• A. ${\left(a-b\right)}^3$
• B. $a^3-b^3$
• C. $a^3+b^3$
• D. ${\left(a+b\right)}^3$

Answer: Option D

Explanation: