Use Mathematical Induction to Solve for All Positive Integers N $\left( n ^ { 3 } + 7 n ^ { 2 } + 6 n \right)$

Multiple Choice

Use mathematical induction to solve for all positive integers n. ​
A factor of $\left( n ^ { 3 } + 7 n ^ { 2 } + 6 n \right)$ is:
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A) 7
B) 9
C) 8
D) 6
E) 3