What will be P(k + 1) for P(n) = n3 (n + 1)?

• A. (k + 1)4
• B. k4 + 5k3 + 9k2 + 7k + 2
• C. k4 + 6k3 + 9k2 + 7k + 2
• D. k4 + 3k3 + 9k2 + 6k + 2