Factor $7 x ^ { 4 } - 77 x ^ { 3 } + 196 x ^ { 2 }$

Multiple Choice

Factor: $7 x ^ { 4 } - 77 x ^ { 3 } + 196 x ^ { 2 }$

A) $7 x ^ { 2 } ( x + 7 ) ( x + 4 )$
B) $7 x ( x - 7 ) ( x - 4 )$
C) $7 x ^ { 2 } ( x - 7 ) ( x - 4 )$
D) $7 \left( x ^ { 2 } + 7 \right) \left( x ^ { 2 } - 4 \right)$
E) Nonfactorable over the integers