If ( f(x) = 3x³ - 8x² + 9x - 6 ) and ( g(x) = 0 ), find ( (f ∘ g)(x) ).
a) ( 3x³ - 8x² + 9x - 6 )
b) ( 0 )
c) ( 3 )
d) ( 27x³ - 72x² + 81x - 54 )