If ..., find the first partial derivatives and at the point (0, 0, 0).

A) ∂f/∂x = ..., ∂f/∂y = ..., ∂f/∂z = ...
B) ∂f/∂x = ..., ∂f/∂y = ..., ∂f/∂z = ...
C) ∂f/∂x = ..., ∂f/∂y = ..., ∂f/∂z = ...
D) ∂f/∂x = ..., ∂f/∂y = ..., ∂f/∂z = ...