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y=sinx+e^(x) then (d^(2)x)/(dy^(2)) is:...

`y=sinx+e^(x)` then `(d^(2)x)/(dy^(2))` is:

A

`-1/((cosx+e^(x))^(3))`

B

`(cosxx+e^(x))/((sinx+e^(x))^(3))`

C

`(sinx-e^(x))/((cosx+e^(x))^(3))`

D

`(sinx+cosx)/((sinx+e^(x))^(3))`

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