Why is it fair to use either recursion or iteration to solve a problem like factorial?

Group of answer choices

Factorial describes how the result should look $($e$.$g$.,6!=6*5*4*3*2*1),$ it doesn't require a specific algorithm to get the result.

This is incorrect, factorial can only be implemented using iteration.

This is incorrect, factorial can only be implemented using recursion.

Because we are using Scheme, other languages don't support both recursion and iteration.