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Let f:RR to RR,g:RR to RR and h:RR to RR...

Let `f:RR to RR,g:RR to RR` and `h:RR to RR` be differentiable functions such that `f(x)=x^(3)+3x+2,g(f(x))=x` and `h(g(g(x)))=x` for all `x in RR`. Then,

A

`g'(2)=(1)/(15)`

B

`h'(1)=666`

C

`h(0)=16`

D

`h(g(3))=36`

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