Find the Second Derivative of the Function $$f ( x ) = \left( 3 x ^ { 3 } + 7 \right) ^ { 7 }$$

Multiple Choice

Find the second derivative of the function. $$f ( x ) = \left( 3 x ^ { 3 } + 7 \right) ^ { 7 }$$

A) $f ^ { tt } = 63 x ( 7 + 3 x ) ^ { 5 } \left( 14 + 63 x ^ { 3 } \right)$
B) $f ^ { tt } = 63 x \left( 7 + 3 x ^ { 3 } \right) ^ { 5 } \left( 14 + 60 x ^ { 3 } \right)$
C) $f ^ { tt } = 63 x \left( 7 + 3 x ^ { 2 } \right) ^ { 5 } \left( 14 + 60 x ^ { 3 } \right)$
D) $f ^ {tt } = 63 x \left( 7 + 3 x ^ { 3 } \right) ^ { 5 } \left( 14 + 63 x ^ { 3 } \right)$
E) $f ^ { tt } = 63 x \left( 7 + 3 x ^ { 3 } \right) ^ { 5 } \left( 14 - 60 x ^ { 3 } \right)$