B. preparing a script
C. adding voices to the animation
D. choosing an animation tool
1. Script,2.Storyboarding,3.Choosing a Animation tool, 4. Adding voices to the animation
Script comes first since that you have to follow everything on there, then you have to make a illustration of the storyboard, then it comes to choosing which animation tool is better, and last but definitely not least is adding voices to that animation.