Find the Derivative Of $y = \cosh ^ { 2 } ( 6 x ) + \sinh ^ { 2 } ( 6 x )$

Multiple Choice

Find the derivative of $y = \cosh ^ { 2 } ( 6 x ) + \sinh ^ { 2 } ( 6 x )$ .

A) $12 \cosh ( 6 x ) + 12 \sinh ( 6 x )$
B) $24 \cosh ( 6 x ) \sinh ( 6 x )$
C) $12 \sinh ^ { 2 } ( 6 x ) + 12 \cosh ^ { 2 } ( 6 x )$
D) 0