Decide Whether the Composite Functions, F ° G and G $$f ( x ) = x ^ { 2 } + 1 , g ( x ) = \sqrt { x } - 1$$

Multiple Choice

Decide whether the composite functions, f ° g and g ° f, are equal to x.
- $$f ( x ) = x ^ { 2 } + 1 , g ( x ) = \sqrt { x } - 1$$

A) No, yes
B) No, no
C) Yes, yes
D) Yes, no